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