Guest Stars Gary Coleman as Hieronymous Fox Ray Walston as Roderick Zale Albert Popwell as Koren Earl Boen as Selmar Melody Rogers as Lieutenant Dia Cyrton Co Starring Felix Silla as Twiki the Robot Mel Blanc voices Twiki the Robot Tony Epper as Drunk Lester C. Fletcher as M.D. Toman Tobar Mayo as Guard Uncredited Eric Server voices Dr. Theopolis