The BEST Episodes of Star Trek
Every episode ever - ranked by fan votes!
Last Updated: Jan 13, 2020
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.
#1 - Balance of Terror
Season 1 - Episode 14 - Aired Dec 15, 1966
Kirk pits the Enterprise against an invisible spaceship testing the Federation's defenses.
#2 - The City on the Edge of Forever
Season 1 - Episode 28 - Aired Apr 6, 1967
Kirk and Spock must travel into the past in order to correct a change that will alter history.
#3 - The Trouble with Tribbles
Season 2 - Episode 15 - Aired Dec 29, 1967
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.
#5 - Amok Time
Season 2 - Episode 1 - Aired Sep 15, 1967
Spock must go to Vulcan in order to perform the Vulcan mating ritual.
#7 - Mirror, Mirror
Season 2 - Episode 4 - Aired Oct 6, 1967
Kirk and three of his officers are accidentally transported into a parallel "mirror" universe where violence, greed, and evil are commonplace.
#8 - Journey to Babel
Season 2 - Episode 10 - Aired Nov 17, 1967
Spock meets his estranged father when the Enterprise escorts a group of ambassadors to a conference on the planet Babel.
#9 - A Taste of Armageddon
Season 1 - Episode 23 - Aired Feb 23, 1967
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.
#10 - Tomorrow is Yesterday
Season 1 - Episode 19 - Aired Jan 26, 1967
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.
#11 - The Enterprise Incident
Season 3 - Episode 2 - Aired Sep 27, 1968
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.
#12 - The Doomsday Machine
Season 2 - Episode 6 - Aired Oct 20, 1967
The Enterprise must stop an ancient doomsday weapon that is capable of destroying entire worlds... and has already totalled one Constellation-class cruiser.
#14 - The Menagerie (2)
Season 1 - Episode 12 - Aired Nov 24, 1966
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.
#16 - Errand of Mercy
Season 1 - Episode 26 - Aired Mar 23, 1967
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.
#17 - This Side of Paradise
Season 1 - Episode 24 - Aired Mar 2, 1967
The Enterprise crew is trapped in paradise when they come to rescue colonists who have fallen to pacifying alien spores and become infected themselves.
#18 - The Devil in the Dark
Season 1 - Episode 25 - Aired Mar 9, 1967
Kirk investigates a series of grisly murders on a mining planet that are the work of a seemingly hostile alien creature.
#20 - The Tholian Web
Season 3 - Episode 9 - Aired Nov 15, 1968
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.
#21 - The Changeling
Season 2 - Episode 3 - Aired Sep 29, 1967
The Enterprise encounters an ancient Earth probe bent on the sterilization of all life.
#22 - Assignment: Earth
Season 2 - Episode 26 - Aired Mar 29, 1968
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.
#23 - Where No Man Has Gone Before
Season 1 - Episode 3 - Aired Sep 22, 1966
While exploring the edge of the galaxy, the Enterprise encounters an energy barrier that gives two crewmen godlike powers.
#24 - The Corbomite Maneuver
Season 1 - Episode 10 - Aired Nov 10, 1966
The Enterprise encounters a vast alien ship that sets out to test them.
#25 - All Our Yesterdays
Season 3 - Episode 23 - Aired Mar 14, 1969
Kirk, Spock, and McCoy become trapped in the past of another world.