Star Trek: The Original Series – Season 2
2-01: Amok Time
When Spock exhibits irrational behavior from pon farr, The Enterprise heads to Vulcan for help.
2-03: The Changeling
Enterprise beams aboard a sophisticated device that poses a grave threat.
2-04: Mirror, Mirror
A transporter accident swaps Kirk, McCoy, Scotty, and Uhura from distinctly opposite parallel universes.
2-05: The Apple
In paradise-like surroundings, a landing party encounters a primitive race controlled by Vaal - a machine revered as a God.
2-06: The Doomsday Machine
Dispatched to investigate the destruction of several planets, the Enterprise encounters the badly damaged U.S.S. Constellation.
2-16: The Gamesters of Triskelion
Kirk, Uhura, and Chekhov are abducted and forced into combat games with other captives.
2-17: A Piece of the Action
Enterprise discovers a gangster-run planet similar to 1930s Earth.
2-20: Return to Tomorrow
Several crew members are possessed by advanced non-corporeal beings.
2-22: By Any Other Name
The Enterprise is commandeered by members of the Kelvan empire, seeking to return to the Andromeda galaxy.
2-23: The Omega Glory
The Exeter is found drifting in space, its crew dead from a mysterious disease, except its missing captain.
2-24: The Ultimate Computer
The Enterprise's test of Dr. Daystrom's greatly enhanced computer becomes deadly.
2-25: Bread and Circuses
Upon investigating the disappearance of the S.S. Beagle crew, the Enterprise encounters a modernized Roman-like civilization.