The third and final season of the American science fiction television series Star Trek, premiered on NBC on Friday, September 20, 1968 and concluded on Tuesday, June 3, 1969. It consisted of twenty-four episodes. Star Trek: The Original Series is an American science fiction television series produced by Fred Freiberger, and created by Gene Roddenberry, and the original series of the Star Trek franchise. It features William Shatner as Captain James T. Kirk, Leonard Nimoy as Spock and DeForest Kelley as Leonard McCoy.