Special Guest Stars Jack Palance as Kaleel Buster Crabbe as Brigadier Gordon Guest Stars Roddy McDowall as Governor Saroyan David Groh as Major Duke Danton Brianne Leary as Ryma Karen Carlson as Stella Warden Macdonald Carey as Dr. Mallory Michael Mullins as Regis Saroyan Co Starring Felix Silla as Twiki the Robot Mel Blanc voices Twiki the Robot Robert Dowdell as Galen Diane Markoff as Female Pilot Sheila Wills as Major Fields June Whitley Taylor as Woman Borah Silver as Husband Don Maxwell as Guard Michael Masters as Worker Don Marshall as Julio Uncredited Eric Server voices Dr. Theopolis