The WORST episodes of Star Trek

Every episode of Star Trek ever, ranked from worst to best by thousands of votes from fans of the show. The worst episodes of Star Trek!

Space. The Final Frontier. The U.S.S. Enterprise embarks on a five year mission to explore the galaxy. The Enterprise is under the command of Captain James T. Kirk, who is assisted by First Officer Mr. Spock, from the planet Vulcan, and Chief Medical Officer Dr. Leonard 'Bones' McCoy. With a determined crew, the Enterprise encounters Klingons, Romulans, time paradoxes, tribbles and genetic supermen led by Khan Noonien Singh. Their mission: to explore strange new worlds, to seek new life and new civilizations, to boldly go where no man has gone before.

Last Updated: 9/19/2024Network: NBCStatus: Ended
And the Children Shall Lead
star
6.21
880 votes

#1 - And the Children Shall Lead

Season 3 - Episode 4 - Aired 10/11/1968

The Enterprise travels to a planet where the members of a scientific team appear to have killed themselves. Their orphaned children are brought back to the ship, where they begin exhibiting odd behavior.

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The Alternative Factor
star
6.34
961 votes

#2 - The Alternative Factor

Season 1 - Episode 27 - Aired 3/30/1967

Kirk and Spock encounter an alien named Lazarus who claims to be from an anti-matter universe.

Directors: Gerd Oswald
Writer: Don Ingalls
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The Omega Glory
star
6.44
818 votes

#3 - The Omega Glory

Season 2 - Episode 23 - Aired 3/1/1968

The Enterprise investigates the disappearance of another starship and discovers a planet where the inhabitants are immortal... and engaged in a strange parallel of Earth's Cold War period.

Directors: Vincent McEveety
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A Private Little War
star
6.47
793 votes

#4 - A Private Little War

Season 2 - Episode 19 - Aired 2/2/1968

Kirk becomes involved in an arms race when the Klingons equip a native people with superior weaponry.

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The Empath
star
6.51
666 votes

#5 - The Empath

Season 3 - Episode 12 - Aired 12/6/1968

On a planet doomed to destruction, Kirk, Spock & McCoy become involved with two aliens who use them as laboratory animals in a bizarre series of tests on an alien empath who may be the savior of her planet.

Directors: John Erman
Writer: Joyce Muskat
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Elaan of Troyius
star
6.57
734 votes

#6 - Elaan of Troyius

Season 3 - Episode 13 - Aired 12/20/1968

The Enterprise must escort an alien princess to her marriage to seal an interplanetary alliance... but she becomes attracted to Kirk.

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The Way to Eden
star
6.57
759 votes

#7 - The Way to Eden

Season 3 - Episode 20 - Aired 2/21/1969

The Enterprise picks up a group of space "hippies" looking for Eden.

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Catspaw
star
6.58
990 votes

#8 - Catspaw

Season 2 - Episode 7 - Aired 10/27/1967

When a landing party disappears and one man is beamed up dead, Kirk and Spock investigate and meet a pair of aliens who seem capable of performing magic.

Directors: Joseph Pevney
Writer: Robert Bloch
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The Gamesters of Triskelion
star
6.59
911 votes

#9 - The Gamesters of Triskelion

Season 2 - Episode 16 - Aired 1/5/1968

Kirk, Chekov, and Uhura are kidnapped and forced to participate in a series of gladiatorial games.

Directors: Gene Nelson
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The Savage Curtain
star
6.60
752 votes

#10 - The Savage Curtain

Season 3 - Episode 22 - Aired 3/7/1969

Kirk and Spock meet Abraham Lincoln and Surak of Vulcan and must do battle with some of histories most terrible villians.

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Bread and Circuses
star
6.61
762 votes

#11 - Bread and Circuses

Season 2 - Episode 25 - Aired 3/15/1968

The Enterprise investigates the disappearance of a merchant ship crew on a planet ruled by a twentieth-century incarnation of ancient Rome.

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The Mark of Gideon
star
6.62
694 votes

#12 - The Mark of Gideon

Season 3 - Episode 16 - Aired 1/17/1969

Kirk beams down on a diplomatic mission... and finds himself in an Enterprise where all the crew have vanished and only a mysterious woman resides.

Directors: Jud Taylor
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Spock's Brain
star
6.63
1047 votes

#13 - Spock's Brain

Season 3 - Episode 1 - Aired 9/20/1968

Kirk leads the Enterprise in pursuit of a mysterious alien woman after she beams aboard the bridge and steals Spock's brain.

Directors: Marc Daniels
Writer: Gene L. Coon
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The Apple
star
6.64
942 votes

#14 - The Apple

Season 2 - Episode 5 - Aired 10/13/1967

Kirk attempts to assist a primitive people that are ruled over by a computer named Vaal.

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The Lights of Zetar
star
6.68
783 votes

#15 - The Lights of Zetar

Season 3 - Episode 18 - Aired 1/31/1969

The Enterprise must deal with discorporeal cloud-like corporeal aliens who have already destroyed the inhabitants of a library planet and plan to eliminate the Enterprise crew if they cannot acquire a human host.

Directors: Herb Kenwith
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Let That Be Your Last Battlefield
star
6.69
720 votes

#16 - Let That Be Your Last Battlefield

Season 3 - Episode 15 - Aired 1/10/1969

The Enterprise finds itself host to two alien beings from the same planet, who share an intense and self-destructive hatred of each other.

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Plato's Stepchildren
star
6.71
756 votes

#17 - Plato's Stepchildren

Season 3 - Episode 10 - Aired 11/22/1968

Kirk and his crew find themselves at the mercy of powerful individuals who possess mind-over-matter powers... and plan to use the Enterprise crew for their twisted entertainment.

Directors: David Alexander
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That Which Survives
star
6.73
622 votes

#18 - That Which Survives

Season 3 - Episode 17 - Aired 1/24/1969

Kirk, McCoy, and Sulu are stranded on a barren planet where a mysterious woman attempts to kill them one at a time, while the Enterprise must travel halfway across the galaxy to rescue them.

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Miri
star
6.73
1346 votes

#19 - Miri

Season 1 - Episode 8 - Aired 10/27/1966

Kirk and a landing party are stranded on a planet due to a disease that causes any adult to die a painful death, and must deal with the local children who have survived.

Directors: Vincent McEveety
Writer: Adrian Spies
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Wolf in the Fold
star
6.76
948 votes

#20 - Wolf in the Fold

Season 2 - Episode 14 - Aired 12/22/1967

A serial killer stalks a planet... and Scotty is the prime suspect.

Directors: Joseph Pevney
Writer: Robert Bloch
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Metamorphosis
star
6.82
935 votes

#21 - Metamorphosis

Season 2 - Episode 9 - Aired 11/10/1967

When their shuttle is diverted to a planetoid, Kirk meets one of the pioneers of space flight, Zefram Cochrane.

Directors: Ralph Senensky
Writer: Gene L. Coon
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The Conscience of the King
star
6.82
1143 votes

#22 - The Conscience of the King

Season 1 - Episode 13 - Aired 12/8/1966

Kirk is one of the last survivors who can identify a mass killer, who lurks among a Shakespearean troupe aboard the Enterprise.

Directors: Gerd Oswald
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Turnabout Intruder
star
6.82
837 votes

#23 - Turnabout Intruder

Season 3 - Episode 24 - Aired 6/3/1969

The Enterprise is in danger when Janice Lester, one of Kirk's former lovers, steals his body.

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Whom Gods Destroy
star
6.85
699 votes

#24 - Whom Gods Destroy

Season 3 - Episode 14 - Aired 1/3/1969

Kirk and Spock investigate an insane asylum where a former Starfleet captain is being held, only to discover that he has freed the inmates and is running the place.

Writer: Lee Erwin
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The Immunity Syndrome
star
6.96
741 votes

#25 - The Immunity Syndrome

Season 2 - Episode 18 - Aired 1/19/1968

The Enterprise must destroy an enormous space amoeba before it reproduces and threatens known space.

Directors: Joseph Pevney
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