The Enterprise is in danger when Janice Lester, one of Kirk's former lovers, steals his body.

Kirk, Spock and McCoy are trapped in two parts of another planet's past - a world threatened with destruction when its sun goes supernova.

Aliens force Captain Kirk and First Officer Spock to join forces with "Abraham Lincoln" and "Surak" to battle villains in a contest of good vs. evil.

The crew of the Enterprise encounter an immortal human in this science fiction variation on Shakespeare's The Tempest.

The Enterprise picks up a group of space "hippies" looking for Eden.

Captain Kirk races against time to acquire plague-fighting minerals from a world in the midst of a civil uprising against a grievous social class disparity.

Strange incorporeal aliens threaten the Memory Alpha station and the Enterprise.

A race of overpopulated aliens abduct Captain Kirk to solve their problem.

Captain Kirk faces off with a demented shape-shifting starship captain determined to control the universe.

The Enterprise encounters two duo-chromatic and mutually belligerent aliens who put the ship in the middle of their old conflict.