The BEST Episodes of Star Trek

Every episode ever - ranked by fan votes!

Last Updated: Dec 9, 2019

Network: NBC

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.

Balance of Terror

#1 - Balance of Terror

Season 1 - Episode 14

Kirk pits the Enterprise against an invisible spaceship testing the Federation's defenses.

star 8.02
941 votes
Writers: Paul Schneider
The City on the Edge of Forever

#2 - The City on the Edge of Forever

Season 1 - Episode 28

Kirk and Spock must travel into the past in order to correct a change that will alter history.

star 8.02
1,077 votes
Directors: Joseph Pevney
Writers: Harlan Ellison
The Trouble with Tribbles

#3 - The Trouble with Tribbles

Season 2 - Episode 15

Kirk must defuse a Klingon scheme to destroy a grain shipment... and cope with a seemingly benign creature known as a tribble, which reproduces at amazing speed.

star 7.89
863 votes
Directors: Joseph Pevney
Writers: David Gerrold
Space Seed

#4 - Space Seed

Season 1 - Episode 22

The Enterprise picks up a crew of genetic supermen from the 20th century... and their leader, Khan, plans to create a new empire.

star 7.86
972 votes
Writers: Carey Wilbur, Gene L. Coon
Amok Time

#5 - Amok Time

Season 2 - Episode 1

Spock must go to Vulcan in order to perform the Vulcan mating ritual.

star 7.82
1,034 votes
Directors: Joseph Pevney
Writers: Theodore Sturgeon
The Ultimate Computer

#6 - The Ultimate Computer

Season 2 - Episode 24

The Enterprise is used to test a new super-sophisticated computer, but it soon develops a mind of its own.

star 7.74
822 votes
Writers: D.C. Fontana
Mirror, Mirror

#7 - Mirror, Mirror

Season 2 - Episode 4

Kirk and three of his officers are accidentally transported into a parallel "mirror" universe where violence, greed, and evil are commonplace.

star 7.73
1,030 votes
Directors: Marc Daniels
Writers: Jerome Bixby
Journey to Babel

#8 - Journey to Babel

Season 2 - Episode 10

Spock meets his estranged father when the Enterprise escorts a group of ambassadors to a conference on the planet Babel.

star 7.73
709 votes
Directors: Joseph Pevney
Writers: D.C. Fontana
A Taste of Armageddon

#9 - A Taste of Armageddon

Season 1 - Episode 23

The Enterprise arrives at a planet to establish diplomatic relations and finds itself in the middle of a "peaceful" war that threatens to destroy the ship.

star 7.69
894 votes
Writers: Gene L. Coon, Robert Hamner
Tomorrow is Yesterday

#10 - Tomorrow is Yesterday

Season 1 - Episode 19

The Enterprise collides with a black hole and is thrown back to Earth in the 20th century, where they must find a way back and erase any trace of their presence. Matters become complicated when they rescue an Air Force pilot and cannot return him without changing history... but if he disappears that will change history as well.

star 7.66
890 votes
Writers: D.C. Fontana
The Enterprise Incident

#11 - The Enterprise Incident

Season 3 - Episode 2

An unusually tense and irritable Kirk orders his ship into the Romulan Neutral Zone, where it is promptly surrounded. Beamed to a Romulan ship, Kirk lies about the intrusion, then attacks Spock, who responds with a Vulcan death grip. While the female Romulan commander courts Spock, a secret mission unfolds.

star 7.65
985 votes
Writers: D.C. Fontana
The Doomsday Machine

#12 - The Doomsday Machine

Season 2 - Episode 6

The Enterprise must stop an ancient doomsday weapon that is capable of destroying entire worlds... and has already totalled one Constellation-class cruiser.

star 7.61
1,054 votes
Directors: Marc Daniels
Writers: Norman Spinrad
The Menagerie (1)

#13 - The Menagerie (1)

Season 1 - Episode 11

Spock kidnaps his former captain, the crippled Christopher Pike, and heads for a quarantined planet, putting his career and Kirk's life on the line.

star 7.59
963 votes
Writers: Gene Roddenberry
The Menagerie (2)

#14 - The Menagerie (2)

Season 1 - Episode 12

Spock's court-martial continues as he attempts to justify his abduction of Pike, the theft of the Enterprise, and his heading for a planet declared forbidden by Starfleet.

star 7.55
1,068 votes
Writers: Gene Roddenberry
Court Martial

#15 - Court Martial

Season 1 - Episode 20

Captain Kirk's career is at stake when he is put on trial for the loss of a crewman during an ion storm.

star 7.54
873 votes
Writers: Don M. Mankiewicz, Stephen W. Carabatsos
Errand of Mercy

#16 - Errand of Mercy

Season 1 - Episode 26

The Federation and the Klingon Empire teeter on the brink of war as Kirk investigates Organia, a humble planet inhabited by pacifists that is unwittingly caught in the middle.

star 7.53
829 votes
Directors: John Newland
Writers: Gene L. Coon
This Side of Paradise

#17 - This Side of Paradise

Season 1 - Episode 24

The Enterprise crew is trapped in paradise when they come to rescue colonists who have fallen to pacifying alien spores and become infected themselves.

star 7.53
831 votes
Writers: D.C. Fontana
The Devil in the Dark

#18 - The Devil in the Dark

Season 1 - Episode 25

Kirk investigates a series of grisly murders on a mining planet that are the work of a seemingly hostile alien creature.

star 7.50
829 votes
Directors: Joseph Pevney
Writers: Gene L. Coon
The Return of the Archons

#19 - The Return of the Archons

Season 1 - Episode 21

The Enterprise encounters a seemingly peaceful civilization run by a "benevolent" being named Landru... who intends for them to join his people.

star 7.46
825 votes
Writers: Boris Sobelman
The Tholian Web

#20 - The Tholian Web

Season 3 - Episode 9

Captain Kirk finds himself trapped between dimensions on a disintegrating starship. The Enterprise crew works against time to rescue him as the Tholians weave a destructive energy web around their ship.

star 7.46
739 votes
Writers: Chet Richards, Judy Burns
The Changeling

#21 - The Changeling

Season 2 - Episode 3

The Enterprise encounters an ancient Earth probe bent on the sterilization of all life.

star 7.46
1,056 votes
Directors: Marc Daniels
Writers: John Meredyth Lucas
Assignment: Earth

#22 - Assignment: Earth

Season 2 - Episode 26

The Enterprise is sent on a mission back to Earth in the year 1968, where the crew encounters the mysterious Gary Seven, who claims to have been sent by advanced beings to save the planet.

star 7.44
763 votes
Writers: Art Wallace
Where No Man Has Gone Before

#23 - Where No Man Has Gone Before

Season 1 - Episode 3

While exploring the edge of the galaxy, the Enterprise encounters an energy barrier that gives two crewmen godlike powers.

star 7.44
1,673 votes
Directors: James Goldstone
Writers: Samuel A. Peeples
The Corbomite Maneuver

#24 - The Corbomite Maneuver

Season 1 - Episode 10

The Enterprise encounters a vast alien ship that sets out to test them.

star 7.41
1,077 votes
Directors: Joseph Sargent
Writers: Jerry Sohl
All Our Yesterdays

#25 - All Our Yesterdays

Season 3 - Episode 23

Kirk, Spock, and McCoy become trapped in the past of another world.

star 7.41
719 votes
Directors: Marvin Chomsky
Writers: Jean Lisette Aroeste