' Nightmare at 20,000 Feet' is the third episode of the fifth season American television anthology series The Twilight Zone, based on the short story of the same name by Richard Matheson, first published in Alone by Night (1961).
The Twilight Zone (1959 TV series) (season 5) Stock from ' King Nine Will Not Return' and William Shatner with Nick Cravat (not in full costume) as the gremlin