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