2-17: A Piece of the Action

Enterprise discovers a gangster-run planet similar to 1930s Earth.

Several crew members are possessed by advanced non-corporeal beings.

Enterprise beams aboard a sophisticated device that poses a grave threat.

Kirk, Uhura, and Chekhov are abducted and forced into combat games with other captives.

The Enterprise's test of Dr. Daystrom's greatly enhanced computer becomes deadly.