Seasons & episodes
S2 · E1Amok Time 1967-09-15 · 50 min
First Officer Spock returns to his home world for a brutal Vulcan mating ritual.
S2 · E2Who Mourns for Adonais? 1967-09-22 · 51 min
The crew of the Enterprise are held captive by an alien who turns out to be the Greek god Apollo.
S2 · E3The Changeling 1967-09-29 · 50 min
The crew of the USS Enterprise deals with an indestructible planet-destroying space probe.
S2 · E4Mirror, Mirror 1967-10-06 · 50 min
A 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.
S2 · E5The Apple 1967-10-13 · 50 min
The crew of the Enterprise visits a mysterious paradisical planet controlled by a computer that is served by the local inhabitants.
S2 · E6The Doomsday Machine 1967-10-20 · 51 min
The 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.
S2 · E7Catspaw 1967-10-27 · 50 min
Two powerful aliens threaten the well-being of the Enterprise and her crew.
S2 · E8I, Mudd 1967-11-03 · 51 min
Captain 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.
S2 · E9Metamorphosis 1967-11-10 · 50 min
A shuttle crew from the USS Enterprise encounters a man out of history and his mysterious alien companion.
S2 · E10Journey to Babel 1967-11-17 · 50 min
The Enterprise must transport dignitaries to a peace conference, with an assassin on the loose.
S2 · E11Friday's Child 1967-12-01 · 50 min
The crew of the Enterprise become entangled in a planet's tribal power struggle.
S2 · E12The Deadly Years 1967-12-08 · 50 min
Strange radiation exposes the command crew of the Enterprise to the effects of rapid aging.
S2 · E13Obsession 1967-12-15 · 50 min
Captain James T. Kirk becomes obsessed with destroying a deadly entity he once encountered in his youth.
S2 · E14Wolf in the Fold 1967-12-22 · 51 min
A series of bizarre murders points to Mr. Scott as the prime suspect.
S2 · E15The Trouble With Tribbles 1967-12-29 · 50 min
The Enterprise must protect a very important shipment of grain from both Klingons and some adorable creatures called tribbles.
S2 · E16The Gamesters of Triskelion 1968-01-05 · 50 min
Captain Kirk and his companions are abducted into slavery and trained to fight as gladiators for the gambling entertainment of three disembodied beings.
S2 · E17A Piece of the Action 1968-01-12 · 50 min
The Enterprise visits a planet with an Earth-like 1920s gangster culture.
S2 · E18The Immunity Syndrome 1968-01-19 · 50 min
The crew of the Enterprise encounters an energy-draining field which may be able to destroy the galaxy.
S2 · E19A Private Little War 1968-02-02 · 51 min
The 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.
S2 · E20Return to Tomorrow 1968-02-09 · 50 min
Ancient alien minds are given control of Captain Kirk's and First Officer Spock's bodies.
S2 · E21Patterns of Force 1968-02-16 · 50 min
The crew of the Enterprise tracks down a Federation observer on a planet dominated by a "Naziesque" regime.
S2 · E22By Any Other Name 1968-02-23 · 50 min
Beings from another galaxy commandeer the Enterprise in an attempt to return home.
S2 · E23The Omega Glory 1968-03-01 · 50 min
Captain Kirk must find the cure to a deadly disease and put an end to another Starfleet captain's cultural interference.
S2 · E24The Ultimate Computer 1968-03-08 · 50 min
A skeleton Enterprise crew are assigned to test a revolutionary computer system that is given total control of the ship.