Star Trek: The Original Series, Season 2 - ROLE 1: Mr. Spock (Leonard Nimoy) ROLE 2: Commodore Decker (William Windom) ROLE 3: Capt. James T. Kirk (William Shatner) ALSO: 2-player (Spock/Commodore) In the episode "The Doomsday Machine," Commodore Decker is the sole survivor of an attack by a planet-eating war machine. He tries to use the USS Enterprise on a kamikaze mission to destroy it. Note: Yoostar scenes are often available both as single video clips and in scene packs. Please consider your purchase carefully before downloading.