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