In the fictional Star Trek universe, craylon gas is a toxic gas which appears on desert planets, making them inhospitable or uninhabitable. Star Trek is an American science-fiction franchise spanning six television series, ten feature films, hundreds of novels, computer and video games, and other fan stories. ...
Craylon gas appeared in Star Trek II: The Wrath of Khan on the desert planet Ceti Alpha V where supervillainKhan Noonien Singh had been marooned with his men. Star Trek II: The Wrath of Khan (Paramount Pictures, 1982; see also 1982 in film) is the second feature film based on the popular Star Trek science fiction television series. ... In the science fiction universe of Star Trek, Ceti Alpha V is the fifth planet in the Ceti Alpha star system, consisting of a Class M, or Earth-like environment. ... Doctor Doom, one of the most archetypal supervillains and his arch-enemies The Fantastic Four (in background). ... Khan Noonien Singh is a villain in the fictional Star Trek universe. ...