Episodes
Amok Time
8.3First Officer Spock returns to his home world for a brutal Vulcan mating ritual.
50 min
Who Mourns for Adonais?
6.7The crew of the Enterprise are held captive by an alien who turns out to be the Greek god Apollo.
51 min
The Changeling
7.6The crew of the USS Enterprise deals with an indestructible planet-destroying space probe.
50 min
Mirror, Mirror
8.5A transporter mishap swaps Captain Kirk and his companions with their evil counterparts in a parallel universe. In the so-called Mirror Universe, the Enterprise is a ship of the Terran Empire, an organization as evil as the United Federation of Planets is benevolent.
50 min
The Apple
6.8The crew of the Enterprise visits a mysterious paradisical planet controlled by a computer that is served by the local inhabitants.
50 min
The Doomsday Machine
8.1The starship Enterprise and its heavily-damaged sister ship, the USS Constellation, must work together to stop an alien planet-killing machine headed for the heart of Federation territory.
51 min
Catspaw
6.3Two powerful aliens threaten the well-being of the Enterprise and her crew.
50 min
I, Mudd
7.3Captain Kirk has a second run-in with the conman, Harry Mudd. Mudd is now the supreme ruler of a planet of androids who cater to his every whim.
51 min
Metamorphosis
7.1A shuttle crew from the USS Enterprise encounters a man out of history and his mysterious alien companion.
50 min
Journey to Babel
8.1The Enterprise must transport dignitaries to a peace conference, with an assassin on the loose.
50 min
Friday's Child
6.8The crew of the Enterprise become entangled in a planet's tribal power struggle.
50 min
The Deadly Years
7.4Strange radiation exposes the command crew of the Enterprise to the effects of rapid aging.
50 min
Obsession
7.1Captain James T. Kirk becomes obsessed with destroying a deadly entity he once encountered in his youth.
50 min
Wolf in the Fold
7.1A series of bizarre murders points to Mr. Scott as the prime suspect.
51 min
The Trouble With Tribbles
8.5The Enterprise must protect a very important shipment of grain from both Klingons and some adorable creatures called tribbles.
50 min
The Gamesters of Triskelion
7.2Captain Kirk and his companions are abducted into slavery and trained to fight as gladiators for the gambling entertainment of three disembodied beings.
50 min
A Piece of the Action
7.5The Enterprise visits a planet with an Earth-like 1920s gangster culture.
50 min
The Immunity Syndrome
7.5The crew of the Enterprise encounters an energy-draining field which may be able to destroy the galaxy.
50 min
A Private Little War
7.1The crew of the Enterprise discovers Klingon interference in the development of a formerly peaceful planet and is forced to help maintain a balance of power.
51 min
Return to Tomorrow
7.5Ancient alien minds are given control of Captain Kirk's and First Officer Spock's bodies.
50 min
Patterns of Force
7.7The crew of the Enterprise tracks down a Federation observer on a planet dominated by a "Naziesque" regime.
50 min
By Any Other Name
7.6Beings from another galaxy commandeer the Enterprise in an attempt to return home.
50 min
The Omega Glory
6.4Captain Kirk must find the cure to a deadly disease and put an end to another Starfleet captain's cultural interference.
50 min
The Ultimate Computer
8.0A skeleton Enterprise crew are assigned to test a revolutionary computer system that is given total control of the ship.
50 min
Bread and Circuses
6.9The Enterprise crew investigates the disappearance of a ship's crew on a planet that is a modern version of the Roman Empire.
50 min
Assignment: Earth
7.3While back in time observing Earth in 1968, the Enterprise crew encounters the mysterious Gary Seven who has his own agenda on the planet.
50 min