As the Enterprise approaches planet Omega IV, they find another starship, the U.S.S. Exeter, in orbit. Kirk, Spock and McCoy beam aboard to find the ship abandoned but strewn with uniforms and crystals. The last log entry from the ship's surgeon tells them they have been infected with a deadly virus brought aboard from a returning landing party. Kirk's party beams down to the planet's surface and finds there is one Exeter survivor: Captain Ron Tracey. He has apparently ignored the Prime Directive and has taken sides in a local dispute supporting the Kohms against their arch-rivals, the Yangs. As McCoy tries to find a cure for the virus, Spock and Kirk try to make sense of the situation. They eventually realize there is an odd parallel with Earth's own history.
Did You Know?
The original 1965 script draft named the missing starship as the USS Argentina. The Enterprise landing party consisted of Kirk, Spock, a young navigator named Lieutenant Commander Piper, a helmsman called Lieutenant Phil Raintree, and the ship's doctor named Milton Perry. See more
Tracey asks, "How long would a man live if all disease were erased?" The immune system would breakdown without something to fight, just as muscles atrophy due to lack of use. See more
That which is ours is ours again. It will never be taken from us again.
Special Enhanced version Digitally Remastered with new exterior shots and remade opening theme song See more