第 2 季 共 26 集
播出时间：1967年9月16日
第 1 集 Amok Time
播出时间：1967年9月16日
First Officer Spock returns to his home world for a brutal Vulcan mating ritual.
第 2 集 Who Mourns for Adonais?
播出时间：1967年9月23日
The crew of the Enterprise are held captive by an alien who turns out to be the Greek god Apollo.
第 3 集 The Changeling
播出时间：1967年9月30日
The crew of the USS Enterprise deals with an indestructible planet-destroying space probe.
第 4 集 Mirror, Mirror
播出时间：1967年10月7日
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.
第 5 集 The Apple
播出时间：1967年10月14日
The crew of the Enterprise visits a mysterious paradisical planet controlled by a computer that is served by the local inhabitants.
第 6 集 The Doomsday Machine
播出时间：1967年10月21日
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.
第 7 集 Catspaw
播出时间：1967年10月28日
Two powerful aliens threaten the well-being of the Enterprise and her crew.
第 8 集 I, Mudd
播出时间：1967年11月4日
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.
第 9 集 Metamorphosis
播出时间：1967年11月11日
A shuttle crew from the USS Enterprise encounters a man out of history and his mysterious alien companion.
第 10 集 Journey to Babel
播出时间：1967年11月18日
The Enterprise must transport dignitaries to a peace conference, with an assassin on the loose.
第 11 集 Friday's Child
播出时间：1967年12月2日
The crew of the Enterprise become entangled in a planet's tribal power struggle.
第 12 集 The Deadly Years
播出时间：1967年12月9日
Strange radiation exposes the command crew of the Enterprise to the effects of rapid aging.
第 13 集 Obsession
播出时间：1967年12月16日
Captain James T. Kirk becomes obsessed with destroying a deadly entity he once encountered in his youth.
第 14 集 Wolf in the Fold
播出时间：1967年12月23日
A series of bizarre murders points to Mr. Scott as the prime suspect.
第 15 集 The Trouble With Tribbles
播出时间：1967年12月30日
The ship travels to Deep Space Station K7 to guard a consignment of grain bound for Sherman's Planet. On arrival, a trader named Cyrano Jones gives Lt. Uhura a tribble, with dramatic consequences. Kirk and the crew also have to deal with the arrival of Captain Koloth and his Klingon battlecruiser, but the tribbles unexpectedly reveal a plot to poison the grain.
第 16 集 The Gamesters of Triskelion
播出时间：1968年1月6日
Captain Kirk and his companions are abducted into slavery and trained to fight as gladiators for the gambling entertainment of three disembodied beings.
第 17 集 A Piece of the Action
播出时间：1968年1月13日
The Enterprise visits a planet with an Earth-like 1920s gangster culture, with Runyonesque dialog and costumes.
第 18 集 The Immunity Syndrome
播出时间：1968年1月20日
The crew of the Enterprise encounters an energy-draining space creature.
第 19 集 A Private Little War
播出时间：1968年2月3日
The crew of the Enterprise discovers Klingon interference in the development of a formerly peaceful planet and joins them in what becomes an arms race.
第 20 集 Return to Tomorrow
播出时间：1968年2月10日
Telepathic aliens take control of Captain Kirk's and First Officer Spock's bodies.
第 21 集 Patterns of Force
播出时间：1968年2月17日
The crew of the Enterprise tracks down a Federation observer on a planet dominated by a "Naziesque" regime.
第 22 集 By Any Other Name
播出时间：1968年2月24日
Beings from another galaxy commandeer the Enterprise in an attempt to return home.
第 23 集 The Omega Glory
播出时间：1968年3月2日
Captain Kirk must find the cure to a deadly disease and put an end to another Starfleet captain's cultural interference.
第 24 集 The Ultimate Computer
播出时间：1968年3月9日
A skeleton Enterprise crew are assigned to test a revolutionary computer system that is given total control of the ship.
第 25 集 Bread and Circuses
播出时间：1968年3月16日
The Enterprise crew investigates the disappearance of a ship's crew on a planet that is a modern version of the Roman Empire.
第 26 集 Assignment: Earth
播出时间：1968年3月30日
While back in time observing Earth in 1968, the Enterprise crew encounters the mysterious Gary Seven who has his own agenda on the planet.
