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: 1/6/2024Network: NBCStatus: Ended
Share:
And the Children Shall Lead
star
6.25
856 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.

Watch Now:AmazonApple TV
The Alternative Factor
star
6.35
931 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
Watch Now:AmazonApple TV
The Omega Glory
star
6.46
789 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
Watch Now:AmazonApple TV
A Private Little War
star
6.49
765 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.

Watch Now:AmazonApple TV
The Empath
star
6.52
644 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
Watch Now:AmazonApple TV
Elaan of Troyius
star
6.60
709 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.

Watch Now:AmazonApple TV
Catspaw
star
6.61
961 votes

#7 - 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
Watch Now:AmazonApple TV
The Way to Eden
star
6.61
732 votes

#8 - The Way to Eden

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

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

Watch Now:AmazonApple TV
Bread and Circuses
star
6.62
738 votes

#9 - 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.

Watch Now:AmazonApple TV
The Savage Curtain
star
6.62
724 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.

Watch Now:AmazonApple TV
The Gamesters of Triskelion
star
6.62
879 votes

#11 - 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
Watch Now:AmazonApple TV
The Mark of Gideon
star
6.63
667 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
Watch Now:AmazonApple TV
Spock's Brain
star
6.65
1023 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
Watch Now:AmazonApple TV
The Apple
star
6.67
909 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.

Watch Now:AmazonApple TV
The Lights of Zetar
star
6.68
756 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
Watch Now:AmazonApple TV
Let That Be Your Last Battlefield
star
6.68
695 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.

Watch Now:AmazonApple TV
Plato's Stepchildren
star
6.73
733 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
Watch Now:AmazonApple TV
Miri
star
6.75
1308 votes

#18 - 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
Watch Now:AmazonApple TV
That Which Survives
star
6.75
593 votes

#19 - 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.

Watch Now:AmazonApple TV
Wolf in the Fold
star
6.77
915 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
Watch Now:AmazonApple TV
Turnabout Intruder
star
6.81
803 votes

#21 - 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.

Watch Now:AmazonApple TV
The Conscience of the King
star
6.81
1108 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
Watch Now:AmazonApple TV
Metamorphosis
star
6.82
904 votes

#23 - 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
Watch Now:AmazonApple TV
Whom Gods Destroy
star
6.85
675 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
Watch Now:AmazonApple TV
The Immunity Syndrome
star
6.96
710 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
Watch Now:AmazonApple TV