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Season 1 - Sep. 08, 1966
Season 2 - Sep. 15, 1967
Season 3 - Sep. 20, 1968

Star Trek Season 3 Episode 6
HD
Overview:
Having been found trespassers into Melkotian space, Captain Kirk and his companions are sent to die in a re-enactment of the gunfight at the O.K. Corral.