2-17: A Piece of the Action
Enterprise discovers a gangster-run planet similar to 1930s Earth.
2-05: The Apple
In paradise-like surroundings, a landing party encounters a primitive race controlled by Vaal - a machine revered as a God.
2-03: The Changeling
Enterprise beams aboard a sophisticated device that poses a grave threat.
2-16: The Gamesters of Triskelion
Kirk, Uhura, and Chekhov are abducted and forced into combat games with other captives.