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Roddenberry, Gene (Executive Producer). "The Doomsday Machine." Star Trek, Season 2, Episode 6. Directed by Marc Daniels. Written by Norman Spinrad. Desilu Productions, 20 October 1967.
Roddenberry, Gene (Executive Producer). "The Doomsday Machine." Star Trek, Season 2, Episode 6. Directed by Marc Daniels. Written by Norman Spinrad. Desilu Productions, 20 October 1967.
