Every Star Trek: The Original Series Episode Ranked from Worst to Best

Star Trek, a 1960s TV series, has remained a compelling and influential source of entertainment for over 50 years. The original series, created by Gene Roddenberry, was brimming with ideas about the universe and our place within it. In honor of the continuing voyages of the Starship Enterprise, we’ve ranked all 79 (really 80) episodes of The Original Series (TOS) from worst to best. The quality of an episode depends on factors such as the uniqueness of the premise, writing, story beats, characterization, guest stars, action, music, production values, and visual effects. We slogged through space hippies, stolen brains, and green women to find the best and worst episodes of the very first Trek show. 

If you’re new to Trek and wondering, “Which episode of Star Trek: The Original Series should I watch first?” Read on to find out. If you’re a fan, read on to find out how your favorite episode ranks.

80. Star Trek: The Original Series: “The Alternative Factor”

Directed by: Gerd Oswald
Written by: Don Ingalls
Season: 1, Episode: 27
Airdate: March 30, 1967
Summary: An alien being fights himself across two realities.

“The Alternative Factor” explores the concept of an alternate universe. The USS Enterprise is orbiting a dead planet when it experiences a moment of “nonexistence” due to a fluctuation in the planet’s gravity. Captain Kirk (William Shatner) and his Vulcan First Officer Spock (Leonard Nimoy) investigate. They encounter a maniacal man named Lazarus. Lazarus claims to be fighting his enemy, and the Enterprise experiences blips that drain the dilithium crystals of power. The episode is not as in-depth as other stories involving alternate universes. It lacks cohesion. It could have been more compelling with focused writing, better effects, and an actor better suited to the part.

Part of the problem with the episode is that they originally cast John Drew Barrymore as Lazarus, but he never showed up for filming in protest. Why? The script had a romantic subplot with Lt. Charlene Masters, but it was cut at the last minute. The rumor was because African-American actress Janet MacLachlan was cast as Lt. Masters. It would have led to one of the first interracial romances on television. His failure to appear led to a two-day delay and a lot of confusion for the show. The episode still stinks, but there is some behind-the-scenes drama behind it. Bizarrely, the crew didn’t guard Lazarus. He keeps slipping out of Sick Bay and wandering around, sabotaging the ship. Finally, the episode’s execution of the alternate Enterprise was unconvincing. It’s the worst episode of Star Trek: The Original Series. Plus, it’s the worst beard in television history.

79. Star Trek: The Original Series: “And the Children Shall Lead”

Directed by: Marvin Chomsky
Written by: Edward J. Lakso
Season: 3, Episode: 4
Airdate: October 11, 1968
Summary: A group of children are being controlled by an evil force

The episode “And the Children Shall Lead” is a disappointing Star Trek episode featuring children who are devoid of grief over their parents’ deaths. The members of a research colony have been killed by an unknown force. The only ones left are their children, who exhibit a bizarre power over the crew. An alien entity named Gorgan uses the children to hijack the starship, causing more death for his evil purposes. The episode is frustrating, repetitive, and lacks any sense of inspiration. While there is potential for a good episode featuring children suffering from the trauma of losing their parents, this episode is lacking in empathy and lacks any tension or interest. This episode of was chosen as the “seventh worst” by fans at the 50th anniversary Star Trek convention in August 2016. It’s the worst episode of the already poor third season.

78. Star Trek: The Original Series: “The Way to Eden”

Directed by: David Alexander
Written by: Story by D. C. Fontana and Arthur Heinemann; Teleplay by Arthur Heinemann
Season: 3, Episode: 20
Airdate: February 21, 1969
Summary: A charismatic leader and his followers hijack the Enterprise in their search for Eden

“The Way to Eden” is an embarrassingly silly episode. The Enterprise crew encounters 23rd-century versions of the flower power movement and has a reactionary response. The twentieth episode of season three is heavy-handed with biblical allegory. Using the planet name Eden, poisoned fruit, and the character Adam has all the subtlety of a sledgehammer to the face. The costumes and music are awful, putrid icing on the cake of this dreck.

However, there is something to like in every Star Trek episode, including Spock’s open-mindedness, the suggestion of social unrest, and the planet’s acid-covered vegetation. Interestingly, the late Skip Homeier plays both a Nazi (“Patterns of Force”) and a space hippie. The episode also features psychopathic Sevrin, who refused to be isolated, and Chekov’s former Starfleet Academy flame, Irina. Overall, “The Way to Eden” is a disappointing episode that fails to capture the essence of peace, love, and counterculture in the late 1960s.

77. Star Trek: The Original Series: “The Omega Glory”

Directed by: Vincent McEveety
Written by: Gene Roddenberry
Season: 2, Episode: 23
Airdate: March 1, 1968
Summary: A Starfleet captain violates the Prime Directive by using Federation technology to protect a primitive tribe called the Kohms from barbarians called the Yangs

“The Omega Glory” is a terrible episode, focusing on Kirk’s struggle to stop an intertribal war and protect a less advanced civilization in Southern California. It is the second-to-last episode of the second season. Roddenberry first pitched it as one of several scripts for a new pilot episode. According to These Are the Voyages, Gene L. Coon recognized the story as a clunker when he was running low on stories towards the end of the show’s first year.

The studio tried to bury it but Roddenberry insisted on it getting aired. He constantly rewrote the script, but the studio kept balking. Eventually, they relented and aired it at the end of the second season. This was before NBC gave the green light for the third season of the show. There appears to be widespread agreement that The Omega Glory is a thoroughly bad episode on almost every level. It’s an irredeemable and indefensible disaster, especially coming from the man who invented and strove to define Star Trek.

76. Star Trek: The Original Series: “Spock’s Brain”

Directed by: Marc Daniels
Written by: Gene L. Coon
Season: 3, Episode: 1
Airdate: September 20, 1968
Summary: Kirk pursues aliens who have taken Spock’s brain

“Spock’s Brain” is not the worst episode of Star Trek, but it is the worst season opener of the Original Series. A lady takes Spock’s brain to serve as a replacement part for their machine, prompting Kirk and his crew to go get it. The episode’s only saving grace is its inadvertent hilarity, which makes it worthwhile to watch. The plot of Gene Coon is dismal and senseless, and the acting is probably as good as anyone can make it with the ridiculous script.

The jokes aren’t funny, and the solemn moments elicit uncontrollable laughter. The episode is the essence of terrible science fiction, and it may not be worth re-watching without a beer or glass of wine. In his book, William Shatner referred to this episode as “one of the worst.” Leonard Nimoy has indicated that he felt ashamed throughout the filming of this episode.

75. Star Trek: The Original Series: “Catspaw”

Directed by: Joseph Pevney
Written by: Robert Bloch
Season: 2, Episode: 7
Airdate: October 27, 1967
Summary: Aliens on a mission of conquest hold the crew captive.

“Catspaw,” the first episode to enter production for the second season of Star Trek, was produced as a rare holiday special, a Gothic horror episode set near Halloween. However, it was not the first to air, as “Amok Time” served as the season opener. The episode, which resembled many others, played with the trope of magic in a rational universe and featured aliens with “magical powers” wreaking havoc with the crew. Catspaw is considered a departure from Star Trek’s comfort zone, as it feels like a throwback to earlier episodes. The episode owes a significant debt to Robert Bloch’s earlier short story “Broomstick Ride,” later used in the second season episode “Wolf in the Fold.”

Writer Robert Bloch had some quibbles about the production process, citing budget constraints and the use of opticals in post-production effects. This is the main issue with the episode. The SFX team did the best they could. But the budget for the new season was reduced from $195,000 per episode to $187,500, resulting in only four out of 29 episodes being made for less than the first season cap of $195,000: “The Man Trap,” “The Naked Time,” “Charlie X,” and “Tomorrow Is Yesterday.”

74. Star Trek: The Original Series: “The Empath”

Directed by: John Erman
Written by: Joyce Muskat
Season: 3, Episode: 12
Airdate: December 6, 1968
Summary: While on a mission to pick up a pair of researchers, Kirk, Spock, and McCoy encounter two robed figures who subject them to horrible tortures and an enigmatic woman who may hold the key to their salvation.

“The Empath” is a disappointing episode of Star Trek, with a lazy script, a set that could have been more fitting on “Lost In Space,” and a leading lady that tests the patience of even the most loyal fans. The episode is memorable for its Christian symbolism, with Gem as the Christ figure who must sacrifice herself to save her entire race. However, the Vians, who seem to be reminiscent of the Talosians in “The Cage,” are not as compelling.

The sacrificial theme could have been better if Gem had been given the power of healing by the Vians and given her life to save McCoy. The episode is set in a 1960s black box theater with a performance artist, and the main antagonists are Talosian wannabes. Overall, “The Empath” is a disappointing episode that fails to capture the essence of Star Trek’s original series.

73. Star Trek: The Original Series: “That Which Survives”

Directed by: Herb Wallerstein
Written by: Story by D. C. Fontana; Teleplay by John Meredyth Lucas
Season: 3, Episode: 17
Airdate: January 24, 1969
Summary: A deadly computer image protects a long-dead outpost

“That Which Survives” is a sad and mournful episode of Star Trek, featuring Lee Meriweather as a planetary siren who reluctantly kills an Enterprise crewman. The episode tells the story of a supercomputer in a dead world. The planet appears haunted by a specter that retains the personality of a long-dead woman. The crew races to rescue Captain Kirk, but mysterious malfunctions affect the script. Spock deduces the cause, as the Enterprise was taken apart and reassembled slightly out of phase.

This metaphor is similar to the hastily assembled third season of the show. NBC planned to cancel it after its second season but renewed it at the last minute. The show’s return was not at full strength, and the show faced significant setbacks, including the departure of vital production team members, budget cuts, and the drafting of an outside producer. This episode is an interesting idea. But the whole season was hampered by cutbacks.

72. Star Trek: The Original Series: “Who Mourns for Adonais?”

Directed by: Marc Daniels
Written by: Gilbert Ralston
Season: 2, Episode: 2
Airdate: September 22, 1967
Summary: The Enterprise encounters the Greek god Apollo (Michael Forest) who desires the crew to remain on his planet and worship him. Also, he wishes to take a crewman (Leslie Parrish) for his wife..

This uneven episode of Star Trek explores the future of gods, belief, technology, and magic, with the last survivor of the wanderers, Apollo, being worshipped as the sun god. The episode replaces one form of worship with another, implying that Kirk and his crew are not exploring the cosmos to learn about new life forms or civilizations but instead to affirm mankind’s superiority. The special effects are poor, with the hand in space being a hideous concept and execution.

The episode also highlights the growing ego of William Shatner. Shatner was so bothered by the height difference that he forbade any shots that would have put him and Michael Forest, who is much taller, in the same frame. Every time Shatner spoke to him, according to Forest, Shatner would stand on his toes. The episode is about secular humanists rejecting God and the rejection of submission by false tyrants and beliefs. The episode’s posturing emphasizes the problems with Star Trek’s life cycle, with a narrow and jingoistic perspective that suggests Ancient Greece is the biggest influence on human culture. Additionally, the show tries to reduce rape victims to closing scene punchlines.

71. Star Trek: The Original Series: “The Mark of Gideon”

Directed by: Jud Taylor
Written by: George F. Slavin and Stanley Adams
Season: 3, Episode: 16
Airdate: January 17, 1969
Summary: Kirk is abducted by aliens who wish to use him to help solve their overpopulation problem

“The Mark of Gideon” is a strange episode that resembles the third season of Star Trek. The teaser is fantastic, with Kirk beaming down to an alien world and rematerializing on the transporter pad of the Enterprise. However, the ship seems abandoned, and Kirk finds the bridge empty. The aliens abduct Kirk to solve their overpopulation problem, but the episode makes no sense. The Enterprise arrives at Gideon, rumored to be a paradise, and the planet’s leaders insist that Kirk beam down alone. Why does no one think it’s suspicious?

The episode also has dull scenes with sober, droopy faces and a young female appearing unexpectedly. The elaborate scheme concocted by Gideon’s policymakers is a contrivance, and the crew is slow in figuring out the scheme. The show aimed to tackle social issues like racism, war, pollution, inequality, and overpopulation, but the episode falls short of realizing its potential. The writer Stanley Adams was an actor in “Tribble with Tribbles.” He had recently become concerned about the subject of overpopulation. During the shoot, he suggested to Gene Roddenberry that the show address the issue. Adams acknowledged that he was disappointed in the episode’s conclusion.

70. Star Trek: The Original Series: “The Lights of Zetar”

Directed by: Herb Kenwith
Written by: Jeremy Tarcher and Shari Lewis
Season: 3, Episode: 18
Airdate: January 31, 1969
Summary: Zetarians threaten Lieutenant Mira Romaine

“The Lights of Zetar” is a third-season episode of Star Trek that falls short of its potential. The episode is uneven and flawed, with a space-exorcism theme and a lack of character development. The episode focuses on Lieutenant Mira Romaine, who is introduced as a character on the Enterprise’s bridge. However, the episode lacks an understanding of the non-corporeal beings from the planet Zetar II and their motivations. But the episode introduces the Memory Alpha station, which is the name for the Star Trek wiki.

The episode’s message on survival, individuality, alien possession, and female empowerment could have been brilliant, but it ends up being disappointing.The episode is co-written by the famous ventriloquist Shari Lewis, who created Lamb Chop. To her credit, she chose to break from the norm of Kirk always receiving romantic interests and developed the Scotty-centered (James Doohan) romance. But it couldn’t save the episode.

69. Star Trek: The Original Series: “The Savage Curtain”

Directed by: Herschel Daugherty
Written by: Story by Gene Roddenberry; Teleplay by Gene Roddenberry and Arthur Heinemann
Season: 3, Episode: 22
Airdate: March 7, 1969
Summary: Kirk and Spock are forced into a battle of good and evil.

The episode “The Savage Curtain” in The Original Series is a routine and bland exploration of good vs. evil, with simplistic cartoon terms and a comical depiction of Abraham Lincoln. The episode lacks gravitas and a human-centric approach, focusing on a cops-and-robbers scenario rather than exploring the true enemy. The message is to never lose sight of the true enemy, and the integrity to unite around a common need is crucial. But it uses Abraham Lincoln as a hollow supporting character and portrays Genghis Khan as a horrible Asian stereotype.

Despite its shortcomings, it introduces the Vulcan philosopher Surak and the Klingon emperor Kahless to the Star Trek universe. So, that’s something. This is the last episode to feature the whole ensemble cast of Kirk, Spock, McCoy (DeForest Kelly), Scotty, Uhura, Sulu, and Chekov. Nichelle Nichols, who plays Uhura, makes her farewell appearance in this episode of the show.

68. Star Trek: The Original Series: “Mudd’s Women”

Directed by: Harvey Hart
Written by: Story by Gene Roddenberry; Teleplay by Stephen Kandel
Season: 1, Episode: 6
Airdate: October 13, 1966
Summary: The Enterprise rescues con artist Harry Mudd and his beautiful female cargo

Because it is inexcusably sexist, the plot for “Mudd’s Women” is not engaging enough to survive the test of time. There were certain gender challenges with Star Trek, although they were socially acceptable then. Mudd’s Women introduces one of the few recurring non-crewmember characters and plays on the “Star Trek as space western” motif. This episode, however, is reminiscent of a Warner Brothers cartoon from the 1940s. With three women sporting futuristic hairstyles and the men transforming into wolves with their eyes bulging out of their sockets.

The screenplay is monotonous and uninspired, and the plot is illogical. The lithium crystals went bad for no apparent reason other than to force the Enterprise to visit the mining colony. The “beauty comes from within” moral at the end was so ridiculous that it was painful. However, Roger C. Carmel as Harry Mudd is masterful.

67. Star Trek: The Original Series: “The Conscience of the King”

Directed by: Gerd Oswald
Written by: Barry Trivers
Season: 1, Episode: 13
Airdate: December 8, 1966
Summary: Kirk treads the fine line between justice and vengeance as he investigates a claim that one of his passengers is Kodos, a man who slaughtered 4000 people years earlier.

The episode “The Conscience of the King” is a mundane mystery that lacks science fiction elements and leaves a hollow feeling afterward. The episode features strong performances from Arnold Moss and Barbara Anderson and a decent twist near the end. Kirk pursues a personal vendetta against a man who may or may not be a notorious historical figure who committed mass murder under unusual circumstances. The story is complicated by Kirk’s infatuation with the man’s 19-year-old daughter.

The episode ends with nearly everyone “losing,” and the historical figure dies, putting Kirk and another crew member (Lt. Riley) at risk. Nevertheless, the episode feels hollow and lacks any lesson. The episode is based on William Shakespeare’s Hamlet and features no futuristic sci-fi trappings, overwrought melodrama, and romantic involvement with Karidian’s daughter Lenore. The highlight of the episode is Uhura singing one of her songs. It’s not much, but it’s something.

66. Star Trek: The Original Series: “Shore Leave”

Directed by: Robert Sparr
Written by: Theodore Sturgeon
Season: 1, Episode: 15
Airdate: December 29, 1966
Summary: While on shore leave, the crew’s thoughts mysteriously come to life

Spock is hit three times with pointed flower darts, a force field, and artificial lightning in this episode, which is unintentionally funny. The outfits are inadvertently hilarious, and the mindless religious cult part of the tale could have been interesting. The episode also kills five red shirts, one of whom was killed by darts, another by lightning, another after tripping on an exploding rock, and a fourth whom a native whacked.

Kirk’s grief and despair at the murders of his red shirts are nicely explored in this episode. The episode concludes with the annihilating of Vaal, much like Trelane’s mirror or Apollo’s temple. Overall, “Shore Leave” is a poor Star Trek episode but an accidentally funny one.

65. Star Trek: The Original Series: “The Apple”

Directed by: Joseph Pevney
Written by: Story by Max Ehrlich; Teleplay by Max Ehrlich and Gene L. Coon
Season: 2, Episode: 5
Airdate: October 13, 1967
Summary: The crew discovers a paradise controlled by a computer.

“The Apple” is a memorable episode of Star Trek, featuring a giant evil dragon head sculpture, David Soul in orange body paint, and Spock as Satan in the Garden of Eden. The episode is a satirical portrayal of religion, with Kirk and his crew destroying a metaphorical Garden of Eden to free the natives from religious oppression. The episode is criticized for its lackluster analysis of a stagnant, naive society ruled by a machine. The Spock/McCoy debate on the Prime Directive is a brief aspect of interest. The episode is mostly boring, with everything from routine jeopardy to a half-baked theme about physical love. The Apple is also notable for being the first episode to heavily feature Chekov, a character added to the cast roster at the start of the second season. The show often treated science and religion as opposed to one another.

It gives the message that mankind had evolved past the need for religion, despite the occasional network-mandated reference to God in scripts like “Who Mourns for Adonais?” or “Bread and Circuses.” The show’s commitment to science-fiction meant picking “science” above all else. Originally, the screenplay called for Enterprise’s phasers to destroy Vaal’s stone dinosaur skull. The props crew had worked hard to make it out of paper mache’ and refused to let it be destroyed. It is pretty awesome.

64. Star Trek: The Original Series: “Wolf in the Fold”

Directed by: Joseph Pevney
Written by: Robert Bloch
Season: 2, Episode: 14
Airdate: December 22, 1967
Summary: Scotty is implicated in a Jack the Ripper-style murder

“Wolf in the Fold” is a Star Trek murder mystery in which Scotty is the lead suspect. He suffers from blackouts and memory loss during two of the three murders and blames the Argelian administrator Hengist. The episode is not progressive and features misogyny that was prevalent in the original Star Trek. The pacing and tone are inconsistent, and the script is borderline sexist. For the majority of Star Trek, James Doohan (“Scotty”) conceals his right hand, which was missing the middle finger due to a D-Day injury during WWII. His fingers are disguised by curling around the edge of the plate while being questioned with his hand lying on the lie detector scanner. A stunt double’s five-digit hand is seen splayed across the plate during a close-up picture of the machine reacting to an intended falsehood. Doohan later mentioned this in his autobiography as one of his favorite episodes.

The episode has some interesting twists, but the plot is a little unbelievable. Plus,  Scotty’s blackouts are never addressed. In an episode where battling “ultimate evil” is a big topic, the light-hearted ending seems out of place. But John Fiedle, who played the voice of Piglet in Disney’s Winnie the Pooh productions, does a decent job.

63. Star Trek: The Original Series: “Elaan of Troyius”

Directed by: John Meredyth Lucas
Written by: John Meredyth Lucas
Season: 3, Episode: 13
Airdate: December 20, 1968
Summary: Kirk must tame a shrew when he undertakes a stormy mission of peace: taking the high priestess of a warrior people to marry an enemy ruler.

The episode features the Dohlman of Elas, Elaan (France Nuyen), an unruly woman who needs to learn civility and act outside her home world. The Enterprise is assigned the diplomatic task of ferrying the Dohlman to her royal wedding on the planet of Troyius. It’s supposed to bring peace to the warring planets and stability to a region of space claimed by both the Federation and the Klingon Empire. She’s portrayed as a violent and uncivilized brat in need of lessons in manners, while the men around her are more level-headed and reasonable. The episode is criticized for its sexist, chauvinistic, and borderline racist portrayal of women, particularly Asian women.

The title alludes to the myth of Helen of Troy, the famous legend of a woman whose beauty led to the Trojan War. However, the bulk of the story feels like “The Taming of the Shrew.” Elaan has no redeeming characteristics and is incredibly short-tempered for a monarch. Kirk shows a disgustingly chauvinistic side by threatening her with a spanking before slapping her across the face. On the other hand, the Klingon subplot is alright. The acting is decent, with other characters like Scotty and Uhura having more to do with the main plot. Many episodes of Star Trek have aged well. Some, like this one, have not. But they’re still fun to watch.

62. Star Trek: The Original Series: “Friday’s Child”

Directed by: Joseph Pevney
Written by: D. C. Fontana
Season: 2, Episode: 11
Airdate: December 1, 1967
Summary: The Enterprise crew becomes embroiled in a local power struggle on a tribal planet.

“Friday’s Child” is a decent episode of Trek, featuring Kirk, Spock, and McCoy negotiating minerals with warlike tribes on Capella IV. The Klingons also participate, leading to a free-for-all between the two tribes. The Enterprise crew intervenes in a tribal dispute with McCoy’s immortal “I’m a doctor, not an elevator!” moment. The episode explores the morality of survival versus compassion for weaker members.

“Friday’s Child” is full of double-crosses and marginally clever traps and tricks. The outdoor photography is beautiful. However, the costumes are ridonkulous. To make the Capellan warriors look like giants, the actors were given elevated shoes and tall headgear. It doesn’t work. Julie Newmar, best known for playing Catwoman in Batman, is a wonderful sight.

61. Star Trek: The Original Series: “The Paradise Syndrome”

Directed by: Jud Taylor
Written by: Margaret Armen
Season: 3, Episode: 3
Airdate: October 4, 1968
Summary: Kirk loses his memory and begins a life in a native village

Captain Kirk and his landing party investigate a paradise-like planet. It’s populated by tribes of people that resemble Native Americans. When Kirk goes missing, Spock and the Enterprise are forced to leave him behind to divert the asteroid before it’s too late. Kirk wakes up with amnesia and falls in love with Miramanee (Sabrina Scharf). The subplot follows Spock’s failed attempt to deflect the asteroid. Both stories are fairly palatable, but neither is captivating. Kirk’s story benefits from the enlightening idea that being in love and living a simple life has made him “truly happy” for the first time in his life. The episode ends on a downbeat note, but the 1960s conviction that a primitive lifestyle was idyllic and trouble-free is a bit disappointing.

The best part of the episode is Spock’s quest to decipher the symbols on the asteroid deflector, which is beyond the realm of any possible coincidence. Besides the story problems, the episode suffers from a complete lack of understanding of Navajo culture. Specifically, they live in teepees, the clothing doesn’t resemble Native American garb, and the characters’ names don’t match Native styles.

60. Star Trek: The Original Series: “Spectre of the Gun”

Directed by: Vincent McEveety
Written by: Gene L. Coon
Season: 3, Episode: 6
Airdate: October 25, 1968
Summary: As punishment for trespassing, Kirk and crew are forced to re-enact the shootout at the OK Corral

“Spectre of the Gun” is a bizarre episode of “Star Trek” that explores the alien threat to the Enterprise crew. The crew is placed in a surreal recreation of the American Old West, where they must avoid a showdown with Wyatt Earp, Doc Holliday, and the crew at the OK Corral. The episode benefits from its bizarre surrealism and Twilight Zone-esque atmosphere, but the story is sometimes stiffly executed, with dialog that tends to repeat itself. The ending revolves around the fact that mental discipline controls unreality, and Spock mind-melds with Kirk, Bones, and Scotty to believe that unreal bullets can’t hurt them. NBC wanted Chekov to get more screen time, so they shoehorned him into the story.

The episode could have been more impactful if filmed in a realistic old West setting, but budget constraints forced them to build the framework of a town. The episode’s story and resolution never quite bring the whole thing home, leaving the audience to question whether the alien threat is fated or learned. 

59. Star Trek: The Original Series: “Requiem for Methuselah”

Directed by: Murray Golden
Written by: Jerome Bixby
Season: 3, Episode: 19
Airdate: February 14, 1969
Summary: Kirk and crew meet an immortal human named Flint.

In “Requiem for Methuselah,” the Enterprise crew is infected by a deadly illness. Kirk leads an away team to a planet rich in minerals to find a cure. During their search for medicine, Kirk, Spock, and McCoy encounter a social recluse named Flint, who has built Rayna, an android, using his experiences. Kirk falls in love with Rayna and defends her right to choose her destiny. But nobody finds anything particularly creepy about the creation of a robot love slave. The story questions how useful a person is once they have outlived their sense of purpose. The triangular relationship that develops and ends in tragedy is best utilized in the show’s final scene, where Spock uses a mind meld to relieve Kirk of his burden of grief. The episode showcases the Vulcan’s friendship with Kirk, even though Kirk is unconscious at the time. “Requiem” is not the best but it’s ok. Especially with Scotty and Uhura holding down the fort as the end approaches. This is one of many Star Trek episodes based on William Shakespeare’s “The Tempest”.

58. Star Trek: The Original Series: “The Squire of Gothos”

Directed by: Don McDougall
Written by: Paul Schneider
Season: 1, Episode: 17
Airdate: January 12, 1967
Summary: A powerful entity known as Trelane torments the crew of the Enterprise.

“The Squire of Gothos” is a popular Star Trek story featuring a god-like being and one of the best guest performances in the franchise’s history. The Enterprise is kidnapped by an unknown force near a barren planet, and the landing party is the guests of the quirky lifeform Trelane (William Campbell). But, the story is undisciplined and meandering, with Kirk facing numerous obstacles and Trelane controlling the minds and matters of Kirk’s crew. The ending sequence is overly obvious and overlong, with a theme resembling “Charlie X” with a more sympathetic antagonist. Despite the gimmicks and Campbell’s performance, the episode is not as enjoyable as General Trelane’s delight with himself. One of the best moments happened off-screen. Trelane sees Uhura and tells Kirk “Ah, a Nubian prize. Taken on one of your raids of conquest, no doubt.” William Campbell allegedly had an embarrassing blooper while recording the sentence saying, “Ah, a Nubian slave!” Campbell claims that in response, African-American Civil Rights Movement activist Nichelle Nichols said, “I’ll kick you in the ankle!” 

57. Star Trek: The Original Series: “A Private Little War”

Directed by: Marc Daniels
Written by: Story by Don Ingalls; Teleplay by Gene Roddenberry
Season: 2, Episode: 19
Airdate: February 2, 1968
Summary: The Klingons provide arms to a peaceful planet and disrupt the balance of power

“A Private Little War” is a mildly entertaining episode in the Star Trek series, where Kirk tries to protect primitive aliens from Klingon interference. The episode explores a primitive world where one side receives unnatural advancements in technology, leading the captain to decide to arm the other side with equal weaponry to save them from annihilation. Kirk finds himself under the spell of Nona, who saved his life, and hopes to repay her by arming the village with superior weapons. The episode serves as an explicit Vietnam commentary, with Kirk and McCoy discussing the morality of his plan for armament. The episode also touches on the Prime Directive concept, with the episode focusing on the Garden of Eden metaphor and the use of primitive costumes. Dr. M’Benga is fun and matter-of-fact. It’s a decent episode of the second episode. 

56. Star Trek: The Original Series: “Bread and Circuses”

Directed by: Ralph Senensky
Written by: Gene Roddenberry and Gene L. Coon
Season: 2, Episode: 25
Airdate: March 15, 1968
Summary: Spock and McCoy are forced to fight in Roman-like games

“Bread and Circuses” is an OK episode of The Original Series, featuring the Enterprise crew on a planet modeled on ancient Rome. The crew is forced to fight in gladiatorial games and discover a civilization resembling 20th-century Rome. Kirk, Spock, and Bones are caught and imprisoned, with Kirk facing death if he doesn’t surrender the crew for arena games. The episode engages many TOS clichés, including the Prime Directive being assessed, and holding The Big Three hostage. Rhodes Reason’s antagonist Flavius is well-acted, but the setup is underutilized beyond action sequences. One of the show’s many “parallel Earth” plots, which were created to save money by forgoing the need for “alien” sets, costumes, and makeup.

55. Star Trek: The Original Series: “The Cloud Minders”

Directed by: Jud Taylor
Written by: Story by David Gerrold and Oliver Crawford; Teleplay by Margaret Armen
Season: 3, Episode: 21
Airdate: February 28, 1969
Summary: Kirk is forced into negotiating peace on a planet with severe class inequities

“Cloud Minders”, created 11 years before The Empire Strikes Back, is a classic Star Trek episode that explores class and racism in a floating mining colony. The Enterprise stops at Ardana, divided into Stratoses and Troglytes. Political turmoil makes it difficult for Kirk and Spock to obtain the zenite they need to fight a deadly plague. The episode is flawed with script-related issues but has memorable visuals and ideas. The episode demonstrates Kirk’s humanism and the right of others to impose his beliefs. Although the resolution is idealistic, the story executes well enough, providing a satisfying and engaging conflict. Also, Spock almost gets his groove on. This is one of the first TV roles for football star Fred “The Hammer” Williamson, who later became a prolific film actor.

54. Star Trek: The Original Series: “Turnabout Intruder”

Directed by: Herb Wallerstein
Written by: Story by Gene Roddenberry; Teleplay by Arthur Singer
Season: 3, Episode: 24
Airdate: June 3, 1969
Summary: A woman from Kirk’s past exchanges bodies with him and takes control of the ship.

The final episode of the original Star Trek series is a sexist commentary on gender roles. It features Captain Kirk swapping bodies with a female scientist, making bizarre claims about women being barred from being starship captains. “Turnabout Intruder” is either unintentionally campy or subtly ahead of its time, with Janice Lester using alien technology to place her consciousness in Kirk’s body and vice versa. It suggests that women are too emotionally high-strung to handle command, a hideous notion even for 1969. The episode leaves a bad taste in viewers’ mouths. However, Shatner does a wonderful job of making us see Lester-possessed Kirk as a completely different, emotionally unstable person by using body language and vocal inflection. Sandra Smith also does a great job impersonating Kirk. The acting is good even though the episode is not.

53. Star Trek: The Original Series: “Charlie X”

Directed by: Lawrence Dobkin
Written by: Story by Gene Roddenberry; Teleplay by D. C. Fontana
Season: 1, Episode: 2
Airdate: September 15, 1966
Summary: A powerful teenage boy wreaks havoc aboard the Enterprise

“Charlie X” is an OK episode of Star Trek, built on a mediocre premise that already seems familiar. The episode follows 17-year-old Charlie, who grew up alone on an alien planet after being the sole survivor of a spaceship crash 14 years before. Charlie has psychic powers but is not emotionally mature enough to use them. During his frequent temper tantrums, he makes one Enterprise crewman lose her face, chess pieces melt, and he has a passive-aggressive workout with a shirtless Kirk. The episode is a bold, primary-colored fantasy of ’60s pop art, with Kirk providing shelter aboard the Enterprise to Charlie. The young man’s sympathetic dilemma is a key theme, as he doesn’t understand social norms and feels threatened when faced with unpleasant or adversarial situations. The episode relies less on plot manipulations and instead on intelligently analyzing one person and the understandable problems surrounding him. Robert Walker Jr. delivers a vivid performance, making Charlie pitiable even when he’s sadistic and malevolent. Annoying but pitiable. The story’s conclusion is a necessary yet unfortunate turn of events. Unfortunately, this is a poor episode for Kirk. For some reason, he’s completely unable to articulate significant life lessons. When Charlie asks why you can’t slap strange women on the butt he can’t come up with an answer. Not a good trait for a starship captain.

52. Star Trek: The Original Series: “Metamorphosis”

Directed by: Ralph Senensky
Written by: Gene L. Coon
Season: 2, Episode: 9
Airdate: November 10, 1967
Summary: The Shuttlecraft Galileo makes a forced landing on a world with a single human inhabitant.

“Metamorphosis” is a Star Trek episode that explores alien motivations and love. The episode introduces an important character in the Star Trek universe, who later appears in one of the franchise’s favorite Star Trek movies. The season two episode explores the relationship between the Companion and Cochrane (Glenn Corbett), who have a mutual co-dependence. The episode’s most intriguing aspect is the inventor of Warp Drive’s reaction to learning the Companion is female, prompting questions about love and gender. The episode ends with the Companion merging with the dying Nancy Hedford’s (Elinor Donahue) body, posing intelligent and probing questions about the nature of love and the need for another human form. While the concepts behind the episode are thoughtful the slow pace and the inconsistent story make it hard to watch.

51. Star Trek: The Original Series: “Plato’s Stepchildren”

Directed by: David Alexander
Written by: Meyer Dolinsky
Season: 3, Episode: 10
Airdate: November 22, 1968
Summary: Platonians use psychokinetic power to toy with the crew

“Plato’s Stepchildren” is an embarrassing and cringe-inducing episode that fails to provide new insights into the characters’ inner psyches or the Star Trek universe. The episode features a telekinetically induced humiliation of Kirk and Spock, which is well-executed, but the villains lack redeeming qualities or realistic motivations. The only character who demonstrates depth makes difficult choices, and grows in this episode is Alexander. He makes real discoveries about who he is, what he wants to be, and what’s within his power to do. The episode could have been overlooked if there had been an outstanding performance, rip-roaring adventure, or special effects extravaganza. One saving grace is Star Trek’s first interracial kiss between Kirk and Uhura.

50. Star Trek: The Original Series: “Whom Gods Destroy”

Directed by: Herb Wallerstein
Written by: Story by Lee Erwin and Jerry Sohl; Teleplay by Lee Erwin
Season: 3, Episode: 14
Airdate: January 3, 1969
Summary: Kirk is confronted by one of his heroes, now criminally insane

“Whom Gods Destroy” is a lazy and corny Star Trek episode that rehashes familiar Star Trek elements, with minimal regard for internal logic or plotting. The episode features recycled characters, such as Spock, Marta, and Garth, and lacks originality. The Federation’s facility on an uninhabitable planet for the criminally insane makes little sense. Only 15 of the worst criminals in the universe? Why don’t the Orions, Tellurites, and Andorians have a prison of their own? Steve Ihnat and Shatner do their best, but the episode lacks internal logic and plot. The episode is an exercise in diminishing returns and could have been more engaging. But Kirk did get a love scene with Bat-Girl (Yvonne Craig).

49. Star Trek: The Original Series: “The Man Trap”

Directed by: Marc Daniels
Written by: George Clayton Johnson
Season: 1, Episode: 1
Airdate: September 8, 1966
Summary: A shape-shifting, salt-craving creature terrorizes the crew of Enterprise

This is a well-produced Star Trek episode that questions the utopian Star Trek universe by centering on the demise of the last member of a species and the murder of a relic from a bygone era. Negative gender stereotypes are prevalent in “The Man Trap”, with “Nancy” being the last of her kind. Although the tale moves at a slower pace than a turtle running a marathon and occasionally features Grade B sci-fi music, the cinematography and direction are of a respectable caliber. In actuality, this was the sixth episode that was produced, even though it was the first to be shown on NBC. Because this episode included a monster and more action than any of the previous five, the studio decided to premiere it first. The Man Trap is nevertheless an engaging episode of the show, despite its difficulties.

48. Star Trek: The Original Series: “Where No Man Has Gone Before”

Directed by: James Goldstone
Written by: Samuel A. Peeples
Season: 1, Episode: 3
Airdate: September 22, 1966
Summary: While exploring the energy barrier at the galaxy’s edge that crippled an earlier ship, Kirk’s long-time friend and crewmate Gary Mitchell begins mutating into a god-like entity disdainful of the mortals around him.

In “Where No Man Has Gone Before,” Gary Mitchell, a buddy of Kirk’s, undergoes a mutation that turns him into a god-like being who despises the “mortals” around him. The concept and the eventual creation of the series are connected in this episode. It focuses on how we respond to what we discover and the allure of the unknown. Action sequences, captain decisions, and reflection on the ramifications of being endowed with abilities beyond our control are all there in the well-known second pilot for NBC. In accepting this superbeing, Dr. Elizabeth Dehner (Sally Kellerman) speaks with the voice of early wonder. “Where No Man Has Gone Before” had a bigger effect than “The Cage.” This episode was a pilot, but it wasn’t aired first because the network thought it was “too expository” and wouldn’t function well as the show’s opening episode. They may have been right.

47. Star Trek: The Original Series: “Dagger of the Mind”

Directed by: Vincent McEveety
Written by: Shimon Wincelberg[a]
Season: 1, Episode: 9
Airdate: November 03, 1966
Summary: A new treatment for the criminally insane has deadly results

Fans remember “Dagger of the Mind” for introducing the Vulcan “mind meld,” a form of telepathy used by Spock to obtain information when other methods have failed. The episode also introduces a new treatment for the criminally insane, resulting in deadly consequences. Despite the cliched plot, there’s suspense, decent dialogue, and a subtle reflection on contemporary issues, such as the medical treatment of insane people. It’s not a first-season classic like “Balance of Terror”. But, it does a fascinating job of developing and subverting the futuristic utopia that Star Trek is famous for. “Dagger of the Mind” is a subpar episode of Star Trek, highlighting the exhaustion of Gene Roddenberry, who served as sole producer for the last episode. The plot is filled with holes, which indicates Roddenberry’s early signs of weariness. 

46. Star Trek: The Original Series: “Operation – Annihilate!”

Directed by: Herschel Daugherty
Written by: Steven W. Carabatsos
Season: 1, Episode: 29
Airdate: April 13, 1967
Summary: The Enterprise crew must rid planet Deneva—and Spock – of deadly parasites.

While not among the finest of the season, “Operation: Annihilate!” is a strong science-fiction story that is interesting on its own. Nimoy’s deft use of wincing and writhing to indicate Spock’s struggle of mind over matter works well. However, at times, such as when Kirk and Spock talk about the lifeform arriving from another galaxy, the galactic doublespeak comes across as cheesy. Although the body-snatching extraterrestrial premise of the episode is interesting, a more visceral ending is missing. It is still a competent and usually successful episode, so it is still worth seeing.

45. Star Trek: The Original Series: “The Gamesters of Triskelion”

Directed by: Gene Nelson
Written by: Margaret Armen
Season: 2, Episode: 16
Airdate: January 5, 1968
Summary: Three disembodied beings wager on fights staged by prisoners abducted from around the galaxy

A 23rd-century gladiatorial combat episode called “The Gamesters of Triskelion” centers on Kirk, Chekov, and Uhura after they’re abducted from the Enterprise and sent to a planet under the dominion of The Providers, or Gamesters of Triskelion. The episode is more well-known for its cheese factor than for its insightful analysis of the contentious topic of slavery. The equipped gladiatrix Shahna, portrayed by actress Angelique Pettyjohn, who later landed parts in adult films, is the reason the episode is most remembered. The show is standard escapism stuff with Shatner overacting and occasionally ridiculous dialogue, while the aliens on exhibit have minimal makeup effects. The greatest sequence features Spock demonstrating his readiness to take on the role of full-time commander aboard the Enterprise with McCoy and Scotty. The episode is a noteworthy work of pulp science fiction because it has elements of planetary romance and space opera from the 1950s and 1960s. The episode unduly broadens the definition of “slavery” to present Kirk as the group’s savior. The idea and design of the “superior lifeforms” are implausibly corny, and pitting Spock against Bones is a poor choice as well. The episode concludes with a thud on the floor and is tedious and oppressive.

44. Star Trek: The Original Series: “Assignment: Earth”

Directed by: Marc Daniels
Written by: Story by Gene Roddenberry and Art Wallace; Teleplay by Art Wallace
Season: 2, Episode: 26
Airdate: March 29, 1968
Summary: The Enterprise goes back in time and discovers a mysterious stranger trying to interfere with 20th-century events

“Assignment: Earth” is a cynical and poorly constructed episode of Star Trek that aims to showcase Gene Roddenberry’s proposed television show. The episode is designed to secure Roddenberry’s employment and it shows. It is almost the last episode of the series, and the plot is based on a historic nuclear crisis on Earth in 1968. The Enterprise travels back in time to Earth, encountering the mysterious Gary Seven from another planet. The time-travel motivation is dubious, but the story has some good ideas. The execution is off-kilter, with off-pacing and cross-cutting, making the show choppy. It’s more interested in providing a backdrop to a series that would never come to be than in making its story the priority. Despite the failed back-door pilot episodes, Star Trek managed to limp into a troubled third season, with Gary Seven and his supporting cast eventually being abandoned on the show.

43. Star Trek: The Original Series: “Let That Be Your Last Battlefield”

Directed by: Jud Taylor
Written by: Story by Gene L. Coon; Teleplay by Oliver Crawford
Season: 3, Episode: 15
Airdate: January 10, 1969
Summary: Two survivors of a devasted planet remain committed to destroying one another

The Star Trek episode “Let That Be Your Last Battlefield” examines the racial animosity between two aliens named Lokai (Lou Antonio) and Bele (Frank Gorshin). The episode’s budget was probably significantly reduced by the cast of Frank Gorshin as Bele, and the production team’s financial constraints are especially obvious. The episode is not a great one, but it is legendary and incredibly impactful. It’s the episode I remember from my childhood. As a black child, it moved me to see the way a minor difference in skin coloring resulted in such hatred. The message is still applicable today since hatred has the power to harm us. But, as an adult, the allegory is overly pretentious and didactic, and the plot is rambling and lacks focus. The upshot is a dismal tale with a melancholy conclusion—hatred results in death and a desolate planet. The episode’s self-destruct scenario was one that I found enjoyable but confusing; it was skillfully shot and created tension effectively. Still, the story’s dismal conclusion seems appropriate for a tale that aims to place equal blame on the oppressor and the afflicted.

42. Star Trek: The Original Series: “What Are Little Girls Made Of?”

Directed by: James Goldstone
Written by: Robert Bloch
Season: 1, Episode: 7
Airdate: October 20, 1966
Summary: Kirk finds the long-missing Dr. Corby still alive on a frigid planet, where Kirk becomes a guinea pig in Corby’s mad experiment to create a civilization of obedient androids.

Nurse Christine Chapel (Majel Barrett) is reunited with her fiancé Dr. Roger Korby (Michael Strong), a brilliant scientist who has perfected the ability to create android copies of human beings. Korby aims to replace humanity with these superior, emotionless androids to remove dangerous emotions from society. Kirk disagrees with Korby’s views. Especially when he tries to make Kirk one of his duplicates. The early episodes of Star Trek were conservative in their outlook, presenting the universe as a fascinating and diverse place, but wary of anything truly different and alien. “Little Girls Made Of?” is a rare existential horror from the franchise, offering iconic tropes and thought-provoking questions about the nature of existence. The story explores questions about the impact of removing humanity’s ability to feel in favor of cold, strict logic on violence and aggression, the positive aspects of emotion, and the possibility of preserving a person’s mind in an android body. But some moments in the episode are silly, such as Kirk tricking Ruk into turning against Korby using strategic logic and semantics. However, the show’s moral outlook gradually shifts away from that vision of outer space. Plus, the image of the stalactite Captain Kirk uses as a weapon has been used as a punchline 10 million times. Welcome back, men of culture.

41. Star Trek: The Original Series: “Miri”

Directed by: Vincent McEveety
Written by: Adrian Spies
Season: 1, Episode: 8
Airdate: October 27, 1966
Summary: A strange group of children are discovered on an Earth-like planet.

“Miri” is a dull and uninteresting Star Trek episode that is possibly too strange for its own good. Despite this, the absurd and entertaining storytelling makes it remain engaging. The episode tells a timeless story of the unintended consequences of the fruitless hunt for the “Fountain of Youth,” with the innocent children being forced to mature as a result of their parents’ attempts to slow down aging. Before contracting the infection and going insane violently, the adults turn into the dreaded “grups” with bluish scabs. The kids have a bit too much of a “Lord of the Flies” creep factor, but overall, the tale is good. Numerous kids in this episode were the offspring of Gene Roddenberry and several of the actors. They were the boys of Grace Lee Whitney (Jon and Scott Dweck), William Shatner’s daughters (Leslie and Lisabeth), and Gene’s daughters (Darleen and Dawn). Knowing that Kirk is bringing Elizabeth, a little girl, into the situation makes it even more awesome—a father-and-daughter exchange. The main complaint is that the planet appears almost exactly like Earth with no obvious reason for that, giving the impression that everything that would be alien to our world was left out of the budget. All things considered, “Miri” is a decent episode that tackles the topics of aging, maturing, and the inevitable process of growing up.

40. Star Trek: The Original Series: “Obsession”

Directed by: Ralph Senensky
Written by: Art Wallace
Season: 2, Episode: 13
Airdate: December 15, 1967
Summary: Kirk is determined to hunt down a vampiric entity he failed to destroy in his past

“Obsession,” an episode that deviates from the usual behavior patterns of the series cast and goes over previously covered ground, represents a low point for Captain Kirk. It has been revealed that Kirk’s first deep space expedition was aboard the USS Farragut, which bears the name of David Glasgow Farragut, a flag officer in the US Navy who fought in the American Civil War. He is credited with saying, “Damn the torpedoes, full speed ahead!” as he charged into enemy waters off the Alabama coast, ignoring any danger. He was the first rear admiral, vice-admiral, and admiral in the history of the United States Navy. While Obsession is a standard Star Trek episode, it delivers uncertainty, a sinister menace, and a nuanced perspective on James T. Kirk. Kirk, as usual, gets the message and prevents the end of the universe. In addition, a new alien evil Calvin Klein scent is introduced in this episode, and Kirk plays Captain Ahab to find the enigmatic creature that killed his previous crew members. The episode develops Kirk’s persona and goals while offering a unique chance to delve into his pre-Enterprise past. Though not the most nuanced episode in the history of the show, this episode provides a distinctive look into Kirk’s personality and motivations. But there are better examples.

39. Star Trek: The Original Series: “Is There in Truth No Beauty?”

Directed by: Ralph Senensky
Written by: Jean Lisette Aroeste
Season: 3, Episode: 5
Airdate: October 18, 1968
Summary: The sight of a Medusan ambassador causes insanity

The title of the episode is taken from a poem written by English clergyman and poet George Herbert in the 17th century. It is from his poem “Jordan (I)“, line 2: “Who says that fictions merely and false hair/ Become a verse? Is there no beauty in reality?” Miranda (Diana Muldaur) is a beautiful telepath Assisting Ambassador Kollos.  When people see Medusans they go insane. She turns down Enterprise designer Larry and detects homicidal intent in the vicinity. The potent metaphor “Is There in Truth No Beauty?” tackles lofty concepts in the vein of vintage Star Trek. The episode’s authenticity and execution make it stand out from other TOS installments, earning it an easy place as one of the best season three episodes. The human fragility that permeates every character—from Jones to Spock to Kollos—stays with you. Unrequited love, yearning for what you cannot have, and the perils of allowing your emotions to control you seemed to be the main themes of the episode. The storylines of the episode are interwoven throughout, but not many of them are related to beauty. It’s wild to see a young Muldaur. She would return to Star Trek as Dr. Pulaski, the new chief medical officer in Star Trek: The Next Generation.

38. Star Trek: The Original Series: “For the World is Hollow and I Have Touched the Sky”

Directed by: Tony Leader
Written by: Hendrik Vollaerts
Season: 3, Episode: 8
Airdate: November 8, 1968
Summary: An inhabited asteroid is on a collision course with a Federation planet.

A standard Star Trek episode, “For The World is Hollow and I Have Touched the Sky” is largely character-driven and takes place on a soundstage. The veteran actor, Jon Lormer, was also in The Cage (1966) and The Return of the Archons (1967). The Enterprise finds an old occupied generation ship imprisoned in an asteroid. There are plenty of excellent Star Trek episodes that pass for love stories. But, “For the World is Hollow and I Have Touched the Sky” is a cheesy, clumsy, and manufactured love tale. In addition, the plot lacks nuance and emotion for the main characters. The concept of the “spaceship planet” and its societal ramifications are fascinating, but the narrative falls short of its potential. Natira and Bones’ romance is a disappointment since it lacks depth and passion. 

37. Star Trek: The Original Series: “The Naked Time”

Directed by: Marc Daniels
Written by: John D. F. Black
Season: 1, Episode: 4
Airdate: September 29, 1966
Summary: The Enterprise crew catches a virus that removes their inhibitions

In this classic Star Trek episode The Naked Time, a virus causes the crew members to remove their inhibitions and show who they are. One individual develops suicidal thoughts, another believes he is descended from Irish kings, and the most well-known figure, Sulu, strips down and challenges every crew member to a duel. While there are a lot of unanswered plot threads, it’s entertaining to watch the team interact, even when some of them act crazy. The supporting cast is rarely employed at all, and the supporting ensemble is not utilized to its full potential. Additionally, Sulu’s passion for fencing was unmentioned previously, and “The Man Trap” was the last time we saw a glimpse of his personal life. “The Naked Time” is an intriguing example of how the show interacted with the counterculture of the 1960s. The show has endured as a pop culture relic of that era, even though the story mechanics of individual episodes are not flawless.

36. Star Trek: The Original Series: “A Piece of the Action”

Directed by: James Komack
Written by: Story by David P. Harmon; Teleplay by David P. Harmon and Gene L. Coon
Season: 2, Episode: 17
Airdate: January 12, 1968
Summary: Kirk investigates a planet with an Earth-like 1920s gangster culture

“A Piece of the Action” is a funny and clever comedy episode that showcases the charm of the original series. It features moments like Kirk inventing the card game ‘Fizzbin’ and demonstrating that captaining a starship doesn’t qualify him to drive a car. The episode also highlights Gene L. Coon’s passing. The second-season episode has some goofy qualities, with William Shatner trying to imitate a gangster after landing on a planet resembling 1920s Chicago. The cast appears to be having a good time, encouraging viewers to do the same. It’s best to switch off the brain when watching this episode. It is the only occasion on which the Enterprise’s phasers are employed for a broad proximity shot, like this one, in which they are programmed to stun a scattered group of individuals by encircling a central point spanning one city block. Marvel Comics published a sequel story to this as part of their ‘Star Trek: Unlimited series’. The story, “A Piece of the Reaction,” featured the crew of the U.S.S. Enterprise-E (from Star Trek: First Contact) returning to the planet to discover that its society had gone on to model itself after 23rd Century Starfleet, thanks to the communicator that McCoy left behind. The planet is now led by the tough kid Kirk and Spock met in the street, who wishes to hijack the Enterprise-E and finally gain command of a starship, just like his idol, James T. Kirk.

35. Star Trek: The Original Series: “The Galileo Seven”

Directed by: Robert Gist
Written by: Story by Oliver Crawford; Teleplay by Oliver Crawford and Shimon Wincelberg
Season: 1, Episode: 16
Airdate: January 5, 1967
Summary: Seven Enterprise crew members go on a shuttle mission with Spock in command

“The Galileo Seven” is a decent episode of the first season of Star Trek, featuring a solid cast. The episode is a pulpy adventure that shifts the show’s focus and deepens Spock’s character. The Enterprise is carrying vital supplies, but the primary objective is to get them to the destination as soon as possible. The ship conducts a desperate search for the team, but time runs out. Kirk is forced to abandon the search and proceed to a threatened colony in need of medical supplies. The episode is a full-fledged character analysis of Spock, focusing on his logical approach to a survival situation. His logic is sensible if thought through, yet it doesn’t work in practice. The most brilliant line is “Strange—step by step I’ve made the correct and logical decisions, yet two men have died.” Spock seems trapped in a paradox where succumbing to emotion may be the only solution. His final act of desperation proves it. The episode is a decent story that highlights the importance of dialog and characters in Trek’s evolution.

34. Star Trek: The Original Series: “Court Martial”

Directed by: Marc Daniels
Written by: Story by Don M. Mankiewicz; Teleplay by Don M. Mankiewicz and Steven W. Carabatsos
Season: 1, Episode: 20
Airdate: February 2, 1967
Summary: Kirk is recalled for a potential court-martial

The first Star Trek episode to stray from the pulpy adventure genre is “Court Martial.” Kirk is charged with carelessness over Lt. Cmdr. Ben Finney’s demise, making him the first captain of Starfleet to be subject to a court martial. The episode is uneven, with some well-performed and staged courtroom sequences and Elisha Cook Jr. representing Kirk’s defense. When Commodore Stone suggests that Kirk resign his commission to spare himself embarrassment, he requests a court martial. The idea of the court-martial, however, is difficult to accept because it appears to be a standard “red-shirt” death. What makes Finney special? Anyway, the episode’s twist raises more questions than answers. TOS can be quite campy sometimes, and this episode is a good example. The courtroom episode is similar to “The Drumhead” and “Measure of a Man” from Star Trek: The Next Generation. Some find it challenging to take TOS seriously since, more often than not, viewers will recall the campy altercation with the Gorn than the episode’s lofty ideals and concepts.

33. Star Trek: The Original Series: “The Return of the Archons”

Directed by: Joseph Pevney
Written by: Story by Gene Roddenberry; Teleplay by Boris Sobelman
Season: 1, Episode: 21
Airdate: February 9, 1967
Summary: A world run by a computer named Landru traps the Enterprise crew.

“Return of the Archons” is a Star Trek episode that explores a world inhabited by strange behavior and a manipulative dictator named Landru. The crew becomes involved in an underground movement to oppose him. But it turns out he’s a computer. The episode is a metaphor for anti-communist and anti-oneness sentiments, a warning of calculated technology replacing flesh-and-blood anticipation and adaptability, and the need for fighting authorities. However, the plot lacks cohesiveness, with the “red hour” craziness being confusing and other details never fully developed. The resolution in “Archon” is goofy and not convincing enough in story terms. Despite this, “Return of the Archons” has an intelligent underlying structure, but it could have been more engaging. It is the first episode to firmly tie down the tropes of a Star Trek dystopian parable, with few new elements. The episode starts interesting but loses steam as various subplots fail to add together properly. This episode is the first time all these plot elements are brought together to form a cocktail, demonstrating the appeal of this plot structure.

32. Star Trek: The Original Series: “Day of the Dove”

Directed by: Marvin Chomsky
Written by: Jerome Bixby
Season: 3, Episode: 7
Airdate: November 1, 1968
Summary: A malevolent entity pits Klingons against the Enterprise crew

The third-season Star Trek episode “Day of the Dove” examines the mistrust that exists between the Federation and the Klingons. Due to their invasion of a Federation station and trespassing into Federation space, Kirk takes Klingon captives on board the Enterprise. An alien force that feeds on animosity causes the opposing forces to lock into a vicious cycle of fighting, allowing an equal number of Kirk’s men and Klingons to engage in a battle in a violent arena. Kirk has a strong opponent in Michael Ansara’s portrayal of Kang as their mistrust grows into a full-fledged swordplaying duel. The story’s overall “violence is bad” message is effectively conveyed, and the resolution offers a traditional Star Trek resolution. Day of the Dove is a legendary episode that, despite its flaws, offers a definitive perspective on the Klingons and solidifies the Star Trek universe as essentially utopian.

31. Star Trek: The Original Series: “The Enemy Within”

Directed by: Leo Penn
Written by: Richard Matheson
Season: 1, Episode: 5
Airdate: October 6, 1966
Summary: A transporter malfunction creates an evil Kirk

William Shatner plays a whiny and indecisive Captain and a malevolent, id-like Captain in the mediocre Star Trek episode “The Enemy Within.” A transporter accident leaves the captain divided into two parts: a fierce, evil side and a good, weak-willed side. The Enterprise has a shuttlecraft that can transfer the crew back to the ship, but they are stranded on an icy planet. William Shatner chews up the scenery in the episode, which has a grandiose score by Sol Kaplan. The plot revolves around the clever idea of the real Kirk’s gradual decline in willpower and his final incapacity to perform as captain as a result of his weakness. The episode is an effective revisit of Jekyll and Hyde lore and is quite engaging along the way. “The Enemy Within” comes close to being a great Star Trek episode, partly because it splits down the path of William Shatner as an actor. The ‘evil’ Kirk tries to take over the ship incognito but gets caught when he tries to get the ship away from Sulu and the others. The existential crisis of the ‘good’ Kirk, who doesn’t have any real resolve as a leader, is also present. Despite its dated nature, the episode gives Shatner lots of freedom as an actor and highlights the dichotomy of psychology present. Balancing the good with the bad is a challenge for James Tiberius Kirk. If you’re looking for wild, over-the-top acting, it doesn’t get better than this episode. But as a science-fiction story, it’s fun but lacking.

30. Star Trek: The Original Series: “Arena”

Directed by: Joseph Pevney
Written by: Story by Fredric Brown; Teleplay by Gene L. Coon
Season: 1, Episode: 18
Airdate: January 19, 1967
Summary: Mysterious aliens pit Kirk against a Gorn in a barehanded duel.

The Gorn and the Enterprise venture into the territory of the powerful Metrons, who halt both ships and express their disdain for violent ways. The Gorn and Kirk must battle to the death using primitive weapons. The captain is forced to compete against Kirk to save their ship and crew. The episode is based on Fredric Brown’s far superior short story. The lizard-like race of aliens only appeared once in Star Trek: The Original Series. However, 40 years later, they finally returned, given a CGI makeover, on Star Trek: Enterprise. The anti-violent message in “Arena” is heavy-handed, with a final scene that explains the message with all the grace of a two by four to the head. The action sequences are laughably inept, and the Gorn captain’s makeup is not convincing. The “cleverness factor” emerges from Kirk’s situation but is undermined by bad pacing and lack of suspense. But “Arena” is a memorable episode of Star Trek, offering a more thorough expansion and exploration of the back story that has informed half a century of the franchise. It is a testament to the show and a triumph for writer Gene L. Coon.

29. Star Trek: The Original Series: “Tomorrow is Yesterday”

Directed by: Michael O’Herlihy
Written by: D. C. Fontana
Season: 1, Episode: 19
Airdate: January 26, 1967
Summary: A time accident leaves the Enterprise a UFO over 20th-century Earth.

“Tomorrow Is Yesterday” is an intriguing Star Trek time-travel episode in which, following Air Force Captain John Christopher’s UFO sighting, the Enterprise is propelled back to Earth in the 1960s. Kirk is compelled to forbid Christopher from going back to Earth and introducing future information into the timeline. The narrative centers on the value of every ordinary person and how they can change the course of history. The episode starts a legacy of storytelling with no boundaries, making it a trailblazer in the time-travel stories of Star Trek. Unfortunately, the episode features gratuitous sexism when Kirk’s computer refers to him as “dear” and the Enterprise falls in love with him since Starfleet outsources the Enterprise’s upgrading to a planet run by where women. Although the Enterprise is seen flying above Earth in the twenty-first century, there is no introduction or explanation of the ship’s route. Mainly because this episode was intended as a two-parter with “The Naked Time”. This is the first comedy hour of the show, and it’s still a solidly amusing episode despite the attempts of scripts like “Arena” to define the continuity of the series. It’s simple to understand why “Yesterday” is still so popular despite its misogyny, plot holes, and logical contradictions.

28. Star Trek: The Original Series: “The Changeling”

Directed by: Marc Daniels
Written by: John Meredyth Lucas
Season: 2, Episode: 3
Airdate: September 29, 1967
Summary: The Enterprise encounters a probe named Nomad.

“The Changeling” is like a Star Trek mixtape. It deals with Roddenberry’s favorite themes of Kirk having to deal with insane computers, randomly killing red shirts, and religion. It’s a big idea-driven episode that demonstrates the franchise’s lofty science-fiction aspirations. However, the show feels lifeless and lacks a palpable sense of dread or horror. The machine Nomad wanders around the Enterprise, causing trouble but not much concern. “The Changeling” may be a goofy episode for those in the mood for a high redshirt body count or a low-budget version of Star Trek: The Motion Picture. However, it requires dealing with Spock’s mind-melding with a machine and Uhura seemingly being okay the following week even though her entire memory gets erased. It’s one of Uhura’s best episodes but that doesn’t say much. Yes, there are several plot holes and corny special effects, but Shatner’s performance feels restrained. He doesn’t appear to be overly hamming it up as he often did and instead appears to be responding and acting like a regular human being around Spock and the rest of the crew. It’s one of his best episodes if you like your Shat restrained.

27. Star Trek: The Original Series: “I, Mudd”

Directed by: Marc Daniels
Written by: Stephen Kandel
Season: 2, Episode: 8
Airdate: November 3, 1967
Summary: Kirk and company fall prey to their old nemesis Harry Mudd, who is now both ruler and captive of an android civilization.

The second season of Star Trek (TOS) expanded its boundaries with episodes like “I, Mudd,” and “The Trouble With Tribbles.” While some may argue that these episodes led the show to “Spock’s Brain”, they still showcase the goofy and theatrical fun that runs through classic Trek. This is a lighthearted comedy episode that showcases the show’s ability to do comedy well. An android takes the Enterprise to a planet inhabited by androids, where the devious Harry Mudd (Roger C. Carmel) resides. Mudd intends to replace Kirk and his crew, but the androids still prohibit him from leaving. The episode is more entertaining than “Mudd’s Women” from season one, with the verbal jousts and gags being on target. The show’s comedic explorations are not great, as the comedy takes the place of a coherent plot and contradicts some socially progressive philosophies expressed elsewhere in the series. The conclusion is the silliest resolution to a Star Trek episode, but there are solid performances from Carmel, Shatner, and Nimoy.

26. Star Trek: The Original Series: “The Deadly Years”

Directed by: Joseph Pevney
Written by: David P. Harmon
Season: 2, Episode: 12
Airdate: December 8, 1967
Summary: Accelerated aging affects the senior officers and threatens Kirk’s ability to lead

The episode “The Deadly Years” centers on Lt. Galway, Scotty, Bones, Spock, and Kirk as they become significantly older due to an unexplained illness. It’s a race against time to discover a treatment before the team members age and pass away. The episode lacks focus and intensity, even with its impressive performances and use of makeup effects. The primary focus of the essay is an examination of Kirk’s resistance to ceding control of his ship in the face of mental instability. The idea of a competence hearing is a poor attempt to provide “courtroom drama”, but it improves on the previous episode “Court Martial.” But viewers endure a tedious scene in which Kirk is shown to be unable to lead the Enterprise. After the hearing, the search for a cure is put on hold, and Stocker—the most incompetent commander in history—takes command of the Enterprise. Kirk saves the day after Bones finds a remedy. The Romulans make their reappearance in this episode, becoming the second-returning enemy after the Klingons. The majority of the show is devoted to observing the characters’ decline and the competency hearing restating what has previously been witnessed, which results in a stagnant episode. It should have been tightened up because it is a disorganized installment.

25. Star Trek: The Original Series: “Return to Tomorrow”

Directed by: Ralph Senensky
Written by: John T. Dugan
Season: 2, Episode: 20
Airdate: February 9, 1968
Summary: Telepathic aliens take over Kirk and Spock’s bodies

In the Star Trek episode “Return to Tomorrow”, the idea that the cosmos is devoid of gods and that humanity has progressed past the need for a supreme father figure is explored. The narrative centers on an extraterrestrial named Sargon who asks a small group of people to beam down to a planet that was devastated half a million years ago. To develop robot bodies and share their expertise with the rest of the galaxy, Sargon begs Kirk and two of his crew members to donate their bodies. The aliens’ journey is fascinating and frequently moving, but the episode loses its focus in the last part and becomes confusing and meaningless. Spock’s body is taken over by the villain, providing Leonard Nimoy with an intriguing departure from convention. A speech that appears to capture the spirit of adventure in Trek is also featured in this episode, but it is overdone with dramatic flourishes and scenery chewing, coming across as petty and self-important. A decent story about ancient people needing new bodies to survive, a returning young Diana Muldaur, and Spock as a villain are all present in the mediocre episode “Return to Tomorrow”. The story is difficult to accept, though, since it centers around godlike and nearly immortal creatures trapped in spheres located far below a planet’s surface. It’s a silly idea but this is one of the best episodes of season two.

24. Star Trek: The Original Series: “The Tholian Web”

Directed by: Herb Wallerstein
Written by: Judy Burns and Chet Richards
Season: 3, Episode: 9
Airdate: November 15, 1968
Summary: Kirk is trapped in interphase, while the Enterprise is trapped by a powerful energy web

The Enterprise is assigned the duty of looking into the disappearance of the USS Defiant in hostile Tholian territory. Kirk is trapped aboard the Defiant as it gradually fades away from our universe and enters another one. They are being pursued by the Tholians, insectoid aliens that fly crystal ships, and they are encircling both Starfleet ships with an impenetrable web to keep them from getting away. Star Trek’s race-against-the-clock drama captures the recurrent themes and fears of the third season. The episode is set out like a ghost story at sea, with a crew that is on mutiny and a lost ship that is drifting aimlessly. Although the ship goes outside the laws of physics, the image persists in people’s minds. Star Trek’s iconic episode captures the sense of a production staff stuck in a fading and contracting program, speaking to the production realities of the third season. As befits the current state of the show, The Enterprise faces death and insanity. Because of the amazing VFX in this episode, Star Trek received an Emmy Award nomination. The episode is popular despite its slow pacing, with many key moments happening in the third act. 

23. Star Trek: The Original Series: “All Our Yesterdays”

Directed by: Marvin Chomsky
Written by: Jean Lisette Aroeste
Season: 3, Episode: 23
Airdate: March 14, 1969
Summary: Kirk, Spock, and McCoy are sent through time by a machine called the Atavachron, with Kirk landing in the Middle Ages, where he’s accused of witchcraft, and Spock and McCoy in the Ice Age.

The second-to-last episode of the iconic TV show’s last season, “All Our Yesterdays,” centers on a planet whose sun is about to go supernova. Through a library operated by Mr. Atoz, the people manage to escape death by traveling back in time. When Kirk unintentionally travels back in time, he is imprisoned and faces witchcraft charges. Spock and McCoy are sent into the planet’s ice age, where Spock experiences an emotional transformation. After being thrown so deep into the past that the ancient, unruly side of his Vulcan heritage comes to the surface, along with falling in love with Zarabeth, the banished woman, Spock also learns of the Vulcan’s secret darkness. The episode has a slow pace but has thoughtful character study. It’s enjoyable as both a character study and an effective plot. The sentence “five thousand years ago” is moving, but it doesn’t have the desired coherence or reward. All things considered, “All Our Yesterdays” is a cleverly written and enjoyable episode that leaves viewers wondering “what ifs” after it concludes. But the lack of a twist, reveal, or memorable action in the anti-climactic conclusion weighs the episode down.

22. Star Trek: The Original Series: “Patterns of Force”

Directed by: Vincent McEveety
Written by: John Meredyth Lucas
Season: 2, Episode: 21
Airdate: February 16, 1968
Summary: Enterprise is sent to planet Ekos to investigate the disappearance of Federation historian John Gill

An unconventional Star Trek episode called “Patterns of Force” examines the idea of a planet that was inspired by Nazi Germany as a result of Starfleet officer John Gill breaking the Prime Directive. In this episode, Kirk, Spock, and Bones visit a Nazi base in an attempt to outwit the enemy by employing time-honored espionage techniques. “Patterns of Force” offers a lot of insightful and valuable things to say about authority and power, despite the ridiculous premise. Although the message in the show is heavy-handed, it also makes a statement about modern politics and romantic ideals. Nazism spreading on a planet named Ekos illustrates the terrible results of tampering with a culture’s natural development. The primary issue with this episode is that it fails to convey the ambiance of a real alien planet or culture, instead giving the impression that Kirk and Spock have traveled back in time to a time when Nazi Germany ruled Earth during World War II. As if all of this wasn’t absurd enough, in less than fifty minutes, Kirk and Spock overthrow the entire regime, leading the genocidal, goose-stepping Ekosians to realize that maybe death and hatred aren’t such a bad idea after all. The only saving grace is that the cast knows how ridiculous the premise is and sells the humor. Funny Nazis were all over television (looking at you, Hogan’s Heroes), so it works.

21. Star Trek: The Original Series: “Wink of an Eye”

Directed by: Jud Taylor
Written by: Story by Gene L. Coon; Teleplay by Arthur Heinemann
Season: 3, Episode: 11
Airdate: November 29, 1968
Summary: Hyperaccelerated aliens, invisible to the naked eye, take over the Enterprise

“Wink of an Eye” is a Star Trek episode that focuses on character and acting, drawing inspiration from the rich literary genre of ghost ships. The story follows Kirk, who is mysteriously spirited away by a queen and her people, only to discover that time has been distorted in a mysterious realm. The subplot with Spock working on a cure is perfunctory and doesn’t inspire much writing. Compton’s death stands out as a chilling moment, as it shows the nature of things through Deela’s dialogue and character. The camera work is continuously shot at an angle, suggesting the skewed, uncanny nature of the accelerated time stream. Technologically advanced aliens are after our women and men for mating, as they can’t reproduce.  They, apparently, don’t understand how two different species mating won’t produce viable offspring. Despite the limits on makeup and special effects budget, “Wink of an Eye” shows how Roddenberry’s writers and directors could innovate, such as with the radical slow-motion technique used when Kirk is on the same temporal wavelength as the aliens. The plot is weak, but the performances save it.

20. Star Trek: The Original Series: “The Corbomite Maneuver”

Directed by: Joseph Sargent
Written by: Jerry Sohl
Season: 1, Episode: 10
Airdate: November 10, 1966
Summary: While exploring an uncharted area of space, the Enterprise is outmatched and taken in tow by a massive spherical spaceship

The episode emphasizes the two primary Star Trek concepts of conflict avoidance and exploration. Thanks to Captain Kirk’s leadership, the character-driven plot offers insight into the crew in potentially contentious situations. The novel takes place in the polarized years of the Cold War when competing forces consider annihilation by mutual consent. The teasing between the Kirk, Spock, and Bones trio is still in its early stages, and it hasn’t quite reached the legendary level in later episodes. The graphics and vivid colors from the 1960s give the show appeal. With assistance from DeForest Kelley, Leonard Nimoy, Anthony Call, and Clint Howard, William Shatner gives an outstanding performance. The show does a good job of setting up the well-worn Trek story of first contact.

The script called for Leonard Nimoy to react fearfully when he first saw Big Balok, but director Joseph Sargent advised Nimoy to just say “Fascinating” instead of the script’s specified response. This line  helped Spock become a more recognizable character and gave him a catchphrase that has become a classic.

19. Star Trek: The Original Series: “The Immunity Syndrome”

Directed by: Joseph Pevney
Written by: Robert Sabaroff
Season: 2, Episode: 18
Airdate: January 19, 1968
Summary: The Enterprise becomes an antibody to penetrate an energy-draining invader resembling a giant amoeba that has annihilated a star system and is about to reproduce.

“The Immunity Syndrome” is a well-written episode that delves into the Enterprise crew’s battle to flee an enigmatic 11,000-mile-long single-celled creature that has claimed billions of lives. The main plot point of the episode is Kirk having to decide whether to send Spock or Bones on a suicide shuttlecraft mission to investigate the organism from the inside out. The connection between Spock and McCoy is notable because of their lively competitiveness and shared desire to complete the mission.

The episode scores higher on the “pure enjoyment” meter thanks to Sol Kaplan’s score and Spock’s biting edge. “The Immunity Syndrome” features some memorable moments despite being a basic film, such as the opening sequence in which Spock detects the deaths of 400 other Vulcans on board the Intrepid. Notable too are McCoy’s passion as a bioscientist and his faith in the possibility of discovering more about the creature. Some of the most potent scenes in the entire series are when McCoy and Spock interact on their way to the hangar deck. It’s an episode worth watching.

18. Star Trek: The Original Series: “By Any Other Name”

Directed by: Marc Daniels
Written by: Story by Jerome Bixby; Teleplay by D. C. Fontana and Jerome Bixby
Season: 2, Episode: 22
Airdate: February 23, 1968
Summary: Extra-galactic beings commandeer the Enterprise in an attempt to return home

“By Any Other Name” is a Star Trek episode with a campy theme and focuses on yet another alien lifeform intrigued by human sensations. Once again, they take human form for the experiment. The episode introduces god-like beings from the Andromeda Galaxy who have taken over the Enterprise and modified it for the journey out of the Milky Way. The four crew members (Kirk, Spock, Bones, and Scotty) are temporarily disabled, leaving them to undermine the Kelvans with special tricks. Kirk distracts the female Kelvan with love, Bones injects his target with a drug, Scotty gets his subject drunk through a drinking game, and the leader of the hostile aliens watches his people fall apart. While some scenes are silly and the non-morality of the Kalvins is carelessly forgotten at the end,

“By Any Other Name” is a fun and surprising episode that emphasizes the importance of peaceful coexistence for Kirk and the Federation. Marc Daniels applies a light touch to the material, balancing the threat with humor, making the episode surprisingly likable and entertaining.

17. Star Trek: The Original Series: “The Enterprise Incident”

Directed by: John Meredyth Lucas
Written by: D. C. Fontana
Season: 3, Episode: 2
Airdate: September 27, 1968
Summary: Spock finds himself in the unlikely position of being wooed by a Romulan Commander when the Enterprise is captured after entering Romulan space.

The thrilling episode “The Enterprise Incident” centers on one of the greatest espionage tales. The Enterprise enters the Romulan neutral zone on a covert operation to steal a Romulan cloaking device. As Kirk brings the ship into Romulan territory, tensions with the Romulans escalate. While Spock attracts the attention of the Romulan commander (Joanne Linville), Kirk remains imprisoned. The story is based on the “Pueblo Incident.” North Korean forces captured an American intelligence-collecting ship, the USS Pueblo (AGER-2), during the Vietnam War. It served as D.C. Fontana’s original inspiration for this narrative and its title. Without providing any proof, North Korea asserted that the ship had entered its territorial waters.

The event happened on January 23, 1968, which was only two months before Fontana finished her initial story outline draft. Even though the crew was freed over a year later, NK still owns the ship as a “war trophy.” The episode features a well-crafted plot, surprising turns, and sensible action. Spock’s deceitful relationship with the Romulan commander exemplifies a Vulcan version of restrained, cautious, and focused behavior. The act never expresses the emotion that underlies the encounter, yet it is seen. The “Enterprise Incident” is the best episode of season three. 

16. Star Trek: The Original Series: “This Side of Paradise”

Directed by: Ralph Senensky
Written by: Story by Jerry Sohl and D. C. Fontana; Teleplay by D. C. Fontana
Season: 1, Episode: 24
Airdate: March 2, 1967
Summary: The Enterprise visits a colony where floral spores bring peaceful contentment.

The episode “This Side of Paradise” delves into the euphoria that a Federation colony experiences as a result of plant spores. When the plants are brought on board, the whole crew becomes infected, and Kirk is the only one who hasn’t left the Enterprise for “paradise.” The spores deprive individuals afflicted of motivation and self-discipline, but they also make colony members happy all the time. The point of the episode was to comment on the drug culture and hippie commune of the 1960s while refuting Kirk’s theory that humankind cannot advance or evolve in the absence of challenge and conflict.

Spock can feel whole emotions and even fall in love because of the spores. The research team leader has the best moment. After the spores’ impact ends, she thinks back on the years she squandered in a “paradise” where there were no objectives. Though a little thin, the episode is very entertaining.

15. Star Trek: The Original Series: “The Ultimate Computer”

Directed by: John Meredyth Lucas
Written by: Story by Laurence N. Wolfe; Teleplay by D. C. Fontana
Season: 2, Episode: 24
Airdate: March 8, 1968
Summary: Enterprise is used to test the new M-5 computer

“The Ultimate Computer” is a wonderful episode of Star Trek, featuring the testing of a new artificial intelligence, the M-5, onboard the Enterprise. The episode showcases the directing skills of John Meredyth Lucas. The Enterprise is chosen as a test subject for the M-5, a groundbreaking advancement in computer technology designed to make command decisions faster than captains and reduce the number of people required to run a starship. Kirk debates whether he is selfish for wanting to keep his job at the expense of technological progress or if it’s a matter of danger or principle. The episode rejects the racial views of the time by having the white captain defer to a black man.

Once the M-5 goes out of control and hijacks the Enterprise, the episode turns to an analysis of its creator, Dr. Richard Daystrom (William Marshall), who is obsessed with outdoing his prior successes, and Marshall does an amazing job. Despite going a little overboard towards the end, the story is compelling.

14. Star Trek: The Original Series: “The Menagerie, Part II”

Directed by: Robert Butler
Written by: Gene Roddenberry
Season: 1, Episode: 12
Airdate: November 24, 1966
Summary: The Talosians force Kirk to view Captain Pike’s original mission to their world

In the first season, Star Trek’s production time had been continuously increasing due to its complexity, which raised doubts that Desilu Productions would be able to produce episodes to NBC in time to fulfill their series commitments. “The Cage” was the unaired 1965 Star Trek pilot episode, and “The Menagerie” was made to repurpose parts of it. In the episode, Spock is on trial for kidnapping Captain Pike and taking over the Enterprise. To justify his actions, he uses footage of Pike’s incarceration by the Talosians. “The Menagerie, Part II,” is a weaker conclusion to the two-parter but still presents the best moments of the original pilot episode and a satisfying conclusion to Spock’s plan.

The closing scene between Kirk and Spock is sweet, as they have a wonderful bromance despite Spock’s reluctance to acknowledge his feelings. The episode incorporates The Cage into its narrative, establishing the history of the Enterprise and focusing on Spock. William Shatner and Leonard Nimoy are solid in their roles, and the shifting between “The Cage” footage and new footage is sometimes awkward and accompanied by weak explanations. The ending works pretty well, but the question remains as to why Pike was adamant about not going to Talos IV from the outset. Plus, why was Spock never punished for his clear mutiny?

13. Star Trek: The Original Series: “The Menagerie, Part I”

Directed by: Marc Daniels
Written by: Gene Roddenberry
Season: 1, Episode: 11
Airdate: November 17, 1966
Summary: Spock hijacks the Enterprise to return an injured Captain Pike to Talos IV

“The Menagerie” is a two-part episode in the Star Trek series, reworking the unused series pilot “The Cage.” The episode explores themes of sacrifice and loyalty, with Spock willing to sacrifice his own life to save his former captain, Christopher Pike. “The Menagerie, Part I” also highlights the limitations of the Talosians’ powers and the potential dangers of their manipulation. It’s framed by the story of Spock’s mutiny, allowing Captain Kirk to star in an episode of his show.

The episode also explores the themes of sacrifice and loyalty, with Spock’s actions driven by compassion for his suffering friend and mentor. The episode is designed to save money, but it is still a worthwhile exploration of the human inner struggle of mind over matter. The device used to tell the story is clever, and Spock’s theft of the Enterprise and Kirk’s decision to chase the Enterprise in a shuttle demonstrate ingenuity.

12. Star Trek: The Original Series: “Errand of Mercy”

Directed by: John Newland
Written by: Gene L. Coon
Season: 1, Episode: 26
Airdate: March 23, 1967
Summary: Kirk and Spock battle Klingons to free Organia.

To negotiate a settlement for protection against the Klingons, Starfleet sent the Enterprise to the planet Organia. Nonetheless, the Organian people decline to support the Federation and defend their way of life. Led by Kor (John Colicos), the Klingons kidnap Kirk and Spock with the prospect of obtaining war material. The goal of Starfleet is peace, but Kirk is determined to persuade the Organians to use war.

The twist is that the indigenous people show themselves to be god-like beings capable of putting an end to the Federation and Klingon conflict. The Klingon leader, played by John Calicos, adds amusement to the episode. The Klingons resemble humans with excessive testosterone more than the icy, rational Romulans; they are macho and warlike, with several tufts of facial hair growing in strange places and showy military attire. I wonder if we would have received more Klingons if he hadn’t been. The well-realized use of all-powerful entities to preach against violence is seen in Kirk’s passionate defense of the right to wage war. It’s a pulse-pounding episode of the season.

11. Star Trek: The Original Series: “The Cage (Unaired Pilot)”

Directed by: Robert Butler
Written by: Gene Roddenberry
Season: 1, Episode: 0
Airdate: October 4, 1988
Summary: When the Enterprise answers a distress call, Capt. Pike (Jeffrey Hunter) encounters manipulative aliens. Original series pilot.

Star Trek’s 1965 premiere episode “The Cage” starred Jeffrey Hunter as Captain Christopher Pike, Majel Barrett as Number One’s second-in-command, and Leonard Nimoy as Mr. Spock, an extraterrestrial officer. The episode introduces the Trek universe and presents Gene Roddenberry’s vision of the future. It was rejected by the network for being “too cerebral” and asked for a pilot with more action. This led Roddenberry to produce “Where No Man Has Gone Before.” The plot revolves around the starship crew’s exploration of a distant planet that was the scene of a shipwreck eighteen years prior, as well as their encounter with telepathic aliens who are looking for a male human specimen to add to their collection. Leonard Nimoy, who played Mr. Spock in the pilot, was the only actor to be kept in the series in his original character. The theme explores slavery, domination, deception, and manipulation. It’s superb. The early sequences onboard the Enterprise and Leonard Nimoy’s renowned part make this episode innovative for television in the 1960s. Nevertheless, the story doesn’t have enough plot to justify its hour-long running time. Hunter, Barrett, and Nimoy all give excellent performances that complement the characters’ strengths. With well-known sights and sounds, the makeup and images are stunning. But if the episode had continued as is, the show would not have survived a season. It is a misfire. The early exposition dialogue is awkward, especially when it comes to Captain Pike and the overall plot of the program. Yeoman Colt, Vina, Captain Pike, and Number One are among the strong cast of characters. The famous theme song is used to great effect, and the aesthetics—especially the Talosians with their massive throbbing brains—are well-established. To sum up, “The Cage” is an intriguing and significant Star Trek pilot that exemplifies Roddenberry’s future vision but fails in execution.

10. Star Trek: The Original Series: “A Taste of Armageddon”

Directed by: Joseph Pevney
Written by: Story by Robert Hamner; Teleplay by Robert Hamner and Gene L. Coon
Season: 1, Episode: 23
Airdate: February 23, 1967
Summary: Kirk finds his entire crew sentenced to death when the Enterprise is caught in the crossfire of a 500-year-old conflict in which computers decide who will live and who must die.

The Enterprise investigates a planet near another starship’s disappearance but is warned of danger. Upon arrival, Kirk and Spock are informed that the crew has been labeled a casualty of a simulated attack in a simulated war with a neighboring planet. Kirk and his crew are ordered to walk into “disintegration chambers” where their deaths can be tallied. This episode is a well-written anti-war message, with Kirk taking a defiant attitude to change the people’s backward ways. He gives them no choice: give up the simulated war and declare peace, or fight a war with real weapons and destruction, destroying the society they’ve tried to preserve.

The episode explores characters and ideas well, providing good action and satisfying moments. Ambassador Fox, initially a one-note thorn in everyone’s sides, finds many other uses for himself and proves his good ideas for making the universe better for all. This episode worked better than many others this season and helped define an angle for Star Trek’s philosophy, keeping it focused, successful, and optimistic.

9. Star Trek: The Original Series: “The Devil in the Dark”

Directed by: Joseph Pevney
Written by: Gene L. Coon
Season: 1, Episode: 25
Airdate: March 9, 1967
Summary: An unknown monster threatens a critical mining operation.

One of Star Trek’s most memorable episodes is “Devil in the Dark”, which highlights the humanist ideas and philosophy of the program along with the friendship between Kirk, Spock, and McCoy. The crew of a mining colony calls for help when they are being slain by an odd monster that can move through solid rock. The Enterprise answers. This is one of the best of the 80 episodes the series has ever produced. This one showcases Leonard Nimoy’s brilliant performance in the scene where Spock mind melds with the alien Horta. He was able to give emotion and feeling to a giant blob of rubber.

Some of the best ideological ideals of Star Trek are embodied in this episode, including communication with the unknown, tolerance for all life forms, and the hunt for intellect in unexpected places. Along with some inevitable Trek planning hokiness, the episode features a “mystery” involving silicon spheres that turn out to be the eggs of the Horta. “The Devil in the Dark,” for all its idealistic qualities, is the perfect representation of Star Trek’s optimism and anti-cynicism. William Shatner listed this as his favorite episode in his book “Star Trek Memories” because Leonard Nimoy’s delivery of the mind-meld lines made him giggle and because his father passed away during production. He described it as “exciting, thought-provoking, and intelligent; it contained all of the ingredients that made up our very best Star Treks”.The episode is the best example of how the show humanizes aliens and promotes unity. 

8. Star Trek: The Original Series: “Journey to Babel”

Directed by: Joseph Pevney
Written by: D. C. Fontana
Season: 2, Episode: 10
Airdate: November 17, 1967
Summary: Tensions run high when the Enterprise transports ambassadors to the Babel Conferences

The crucial Star Trek episode “Journey to Babel” established the Federation’s reputation as a diverse alliance of extraterrestrial civilizations. It implies that the members of the Federation might not always work in unison with one another and might have different goals and objectives. The episode, which offers viewers insight into Spock’s origins and character, is a personal story about a family going through a difficult time, despite its complex plot. As the franchise approaches its 60th anniversary, its influence is still felt because about 25% of the last season of Enterprise is a prequel to the episode.

The Spock portrayed in the Star Trek movies directed by J.J. Abrams is heavily influenced by the character from “Journey to Babel.” However, the episode remains a superb piece of television, offering diplomatic intrigue, attempted assassinations, and family drama aboard the Enterprise. Writer D.C. Fontana gives McCoy the last word, and the proposed peace summit becomes an Agatha Christie-style murder mystery, making it a memorable Star Trek whodunit. It’s one of the top ten Star Trek episodes of all time.

7. Star Trek: The Original Series: “The Doomsday Machine”

Directed by: Marc Daniels
Written by: Norman Spinrad
Season: 2, Episode: 6
Airdate: October 20, 1967
Summary: A machine that destroys planets threatens the Enterprise.

A superb space opera episode, “The Doomsday Machine” establishes the benchmark for full-on TOS tactical space warfare. The episode centers on Kirk and Commodore Decker’s search for a gigantic, antiquated weapon capable of consuming entire planets. William Windom gives a fantastic performance as Commodore Decker in this episode, and Sol Kaplan’s dramatic score is a highlight. The USS Constellation, the sister ship of the Enterprise, is discovered in space, almost destroyed. The unstoppable device absorbs debris, wipes out entire planets, and advances to the next while Decker, the ship’s captain, is the only member of his crew still alive. He’s driven by a psychotic ambition to destroy the device, even if it means taking his own life.

The episode serves as a reminder of Star Trek’s potential effectiveness despite outside constraints. There’s a subdued allegory about nuclear weapons. Although implied, the plot is never in danger of being overshadowed by the message. The son of Commodore Decker was originally intended to be a regular in Star Trek: Phase II and eventually made an appearance in Star Trek: The Motion Picture. The “planet killer” has become a mainstay of Star Trek tie-in fiction, and the franchise itself has preserved the memory of the episode.

6. Star Trek: The Original Series: “Balance of Terror”

Directed by: Vincent McEveety
Written by: Paul Schneider
Season: 1, Episode: 14
Airdate: December 15, 1966
Summary: After attacking an outpost, Romulans battle the Enterprise

The ninth episode of the original Star Trek series, “Balance of Terror”, is a suspenseful and compelling tale that establishes the franchise’s framework. The first major villain to appear in the series, the Romulans are introduced in this episode, which also marks the beginning of a significant amount of world-building for the show’s universe. The intimacy of the battle and its potential implications boost the adventure even when the effects seem subtle. No other hostile alien race, not even the Borg, makes a more impressive entrance than the Romulans in Star Trek. They stand for a dark period in human history that we would want to ignore, but at our own risk.

“Balance of Terror” sets the tone for all upcoming space wars in the franchise, with a focus on submarine warfare. In addition to being a must-watch episode of the original series, this outstanding science fiction adaptation of the naval war film The Enemy Below (1957) introduces the Romulans to Trek lore and packs in a lot of origin. This is the first appearance of Lenard and he returns next season to play Spock’s father. Director Vincent McEveety, writer Paul Schneider, actor William Shatner, and actor Mark Lenard all deserve gold stars.

5. Star Trek: The Original Series: “Amok Time”

Directed by: Joseph Pevney
Written by: Theodore Sturgeon
Season: 2, Episode: 1
Airdate: September 15, 1967
Summary: Spock falls victim to “pon farr,” the Vulcan mating urge, and challenges Kirk in ritual battle to the death.

Spock was the breakout star of Star Trek. While this irked Shatner, everyone knew it was true. So the first episode of the second season focused on Spock and his home planet, Vulcan. The first officer is suffering in the throes of the seven-year cycle of Pon Farr. The Vulcan time of mating pushes Kirk to give up his assignments and redirect the ship to Spock’s home planet. There they discover that the secretive Vulcan rituals demand that Spock fight to the death for the hand of his bride, T’Pring. Shockingly, she demands that he fight the captain. It’s all an elaborate trick to free herself to make her own decisions about who she will marry. But the emotional turmoil for the Vulcan officer is very real.

Leonard Nemoy was a consummate actor, and his “emotionless” performance is a masterclass in subtlety. No other actor has been able to replicate his skills. But seeing Nomoy make an out-of-control Spock is even more impressive. Plus, the episode is one of the best at showcasing the bond between them. Even McCoy is touched when Spock asks for his “closest friends” to join him on the planet’s surface. The moment Bones touches the normally sarcastic man. He simply says, “I shall be honored, sir.” Noted sci-fi author Theodore Sturgeon wrote the episode. His story has moments of tension and humor. But most of the best moments are in the second half. The first half drags a little on repeat viewing.

4. Star Trek: The Original Series: “The Trouble with Tribbles”

Directed by: Joseph Pevney
Written by: David Gerrold
Season: 2, Episode: 15
Airdate: December 29, 1967
Summary: Kirk, assigned to protect a grain shipment, finds that he has trouble with “tribbles”: balls of purring fluff that live on grain and are incredibly prolific.

“The Trouble with Tribbles” is a classic Star Trek episode that is fan favorite and established Trek’s unique light comedy style. Written by David Gerrold, the episode was inspired by his interest in ecology and the idea of introducing invasive species without predators. The episode features the Enterprise docked at Space Station K-7, where fear-mongering has tarnished a Klingon visit and erupted in trade disputes. Uhura purchases a pregnant Tribble, which eventually overtakes the Enterprise. The episode tackles serious social issues but also manages to be funny. The Tribbles multiply exponentially, and Kirk must balance Federation politics, grain supply and demand, and the Tribble dilemma. The episode was revisited in “Trials and Tribble-ations” on Star Trek: Deep Space Nine. The episode highlights the importance of balancing Federation politics, grain supply and demand, and the Tribble dilemma.”

3. Star Trek: The Original Series: “Space Seed”

Directed by: Marc Daniels
Written by: Story by Carey Wilber; Teleplay by Gene L. Coon and Carey Wilber
Season: 1, Episode: 22
Airdate: February 16, 1967
Summary: Kirk meets Khan, a leader of Earth’s Eugenics Wars of the 1990s.

Kirk and the crew find a ship with the crew in suspended animation. To save them from dying, he has them awakened. That’s where the trouble starts. This episode is the first appearance of Khan Noonien Singh (played by the late, great Ricardo Montalban). He’s an egotistical veteran of the eugenics wars. The character later appeared in the classic Star Trek movie Wrath of Khan. Khan decides she’s the rightful captain of the ship and schemes to take the Enterprise and the heart of artsy redhead Lt. Marla McGivers (Madlyn Rhue). The episode is on every top ten list, but that’s only because of the theatrical film. This episode is good, but not great. Without Montelbahn’s sizable acting skills, the episode falls flat. Khan is supposed to be a genius, but the plot is driven by the crew screwing up. Kirk decides to awaken a ship full of people without knowing who they are. McGivers is a hapless damsel in distress. McCoy almost pees his pants because Kahn has a little scalpel. Still, the dialogue is well done, and it led to one of the best movies in the franchise.

2. Star Trek: The Original Series: “The City on the Edge of Forever”

Directed by: Joseph Pevney
Written by: Harlan Ellison
Season: 1, Episode: 28
Airdate: April 6, 1967
Summary: Kirk and Spock go back in time to save McCoy and their universe

Star Trek’s best episodes have an ethical dilemma. This one seems simple but gets more and more complicated. In this classic story written by Harlen Ellison, McCoy accidentally trips out and goes back in time to the 1930s. They discover that he’s accidentally saved the life of Edith Keeler (Joan Collins). Keeler is a social worker at an inner-city mission. It turns out her passionate speeches about pacifism delayed the United States from entering WWII. The Nazis win the war and conquer the world. She has to die to prevent the deaths of millions. Of course, Kirk falls in love with her, making things even more complicated. Ellison came up with the original concept and the first draft of the script. Unfortunately, the script was rewritten by many others. So it lacks his unique style. Collins was a wonderful actor, but the episode doesn’t give her much to do besides deliver ham-fisted speeches. But it sets the standard for future time travel stories. It’s considered the most expensive episode of the first season and one of the most expensive episodes in the original series ever produced. The average episode cost $185,000 (1.8 million in 2023 after inflation). The overall cost for this episode reached $245,316 (2.3 million).

1. Star Trek: The Original Series: “Mirror, Mirror”

Directed by: Marc Daniels
Written by: Jerome Bixby
Season: 2, Episode: 4
Airdate: October 6, 1967
Summary: Kirk, Scott, McCoy, and Uhura enter a parallel universe.

A transporter accident sends Kirk and his companions into an alternate universe where the only way to get ahead in a starship is through assassination. Mirror Mirror captured the imaginations of fans around the world as they saw the normally illustrious crew of the Enterprise portrayed as mischievous conquerors in an alternate reality. The Federation is replaced with the evil Terran Empire. Fans got to watch their favorite characters play evil villains. Kirk plays a brutal captain with glee. Mr. Spock uses his cruel logic and evil goatee to mess with fans. A heavily scarred Sulu shines as a sweaty womanizer; mirror Chekov is a back-stabbing opportunist. Uhura, who was already sexy, got to play a conniving seductress.

Of course, the whole plot makes no sense. What are the odds that the crew of the Enterprise all grow up the same and end up on the same ship at the same time? The ships from both universes are on the same planet at the same time. The two ships are transporting the same combination of four people at the same time. It’s ridiculous. But no one says every episode of Star Trek is logical. This episode was so powerful that it inspired episodes on Enterprise and Discovery. It’s great fun and an entertaining episode. “Mirror, Mirror” is the best episode of Star Trek: The Original Series. 

Now you know which is the worst and best episodes of Star Trek: The Original Series. You can tackle a binge-watch or just watch the best and worst episodes of the 1960s show. 

What do you think of our rankings? Which is the best episode of Star Trek: The Original Series? Which is the worst episode? Let us know in the comments below!