The Gamesters of Triskelion

Captain Kirk and his companions are abducted into slavery and trained to fight as gladiators for the gambling entertainment of three disembodied beings.

The Trouble With Tribbles

The Enterprise must protect a very important shipment of grain from both Klingons and some adorable creatures called tribbles.

Wolf in the Fold

A series of bizarre murders points to Mr. Scott as the prime suspect.

Obsession

Captain James T. Kirk becomes obsessed with destroying a deadly entity he once encountered in his youth.

The Deadly Years

Strange radiation exposes the command crew of the Enterprise to the effects of rapid aging.

Friday's Child

The crew of the Enterprise become entangled in a planet's tribal power struggle.

Journey to Babel

The Enterprise must transport dignitaries to a peace conference, with an assassin on the loose.

Metamorphosis

A shuttle crew from the USS Enterprise encounters a man out of history and his mysterious alien companion.

I, Mudd

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.