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Roddenberry, Gene (Executive Producer). "Obsession." Star Trek, Season 2, Episode 18. Directed by Ralph Senensky. Written by Art Wallace. Desilu Productions, 15 December 1967.
Roddenberry, Gene (Executive Producer). "Obsession." Star Trek, Season 2, Episode 18. Directed by Ralph Senensky. Written by Art Wallace. Desilu Productions, 15 December 1967.
