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Cited by many aficionados as the all-time best Twilight Zone episode, "Nightmare at 20,000 Feet" benefits immeasurably from a bravura performance by star William Shatner. While travelling through rough weather on a passenger plane, former mental patient Bob Wilson (Shatner) peers out of his window -- and sees a hideous gremlin balanced on the plane's wing. Doubting his own sanity, Bob tries to convince himself that he is merely hallucinating. . .and then the gremlin begins to tear the wing apart. Adapted by Richard Matheson from his own short story, "Nightmare at 20,000 Feet" was originally telecast October 11, 1963. The basic story was later incorporated into the omnibus theatrical feature Twilight Zone: The Movie (1983) and has since been mercilessly lampooned in TV comedy series ranging from The Simpsons to 3rd Rock from the Sun.