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Roddenberry, Gene (Executive Producer). "The Changeling." Star Trek, Season 2, Episode 8. Directed by Marc Daniels. Written by John Meredyth Lucas. Desilu Productions, 29 September 1967.
Roddenberry, Gene (Executive Producer). "The Changeling." Star Trek, Season 2, Episode 8. Directed by Marc Daniels. Written by John Meredyth Lucas. Desilu Productions, 29 September 1967.
