Guest Stars Jamie Lee Curtis as Jen Burton Michael Delano as Malary Pantera Bert Rosario as Sergio Sanwiler Tara Buckman as Majel Co Starring Mel Blanc voices Twiki the Robot Felix Silla as Twiki the Robot Robert Cornthwaite as Warwick Charles Walker as Lt. Zimmerman Jim B. Smith as Shuttle Captain Walter Hunter as Hugo Danny Ades as Gymon Uncredited Eric Server voices Dr. Theopolis