Forbidden Planet
According to fantasy and science fiction scholar Ace G. Pilkington, "Requiem for Methuselah" is a "Star Trek" adaptation of the film "Forbidden Planet" (1956). Actress Anne Francis reported that Gene Roddenberry, the creator of "Star Trek", had talked to her about lifting some ideas from "Forbidden Planet". Actor Leslie Nielsen noted the similarities between "Forbidden Planet" and "Star Trek", suggesting that the film served as a pilot for the television series.