Princess Marcuzan
Dr. Adam Steele (as Jim Karen)
Dr. Nadir
Karen Grant
Gen. Bowers
Col. Frank Saunders / Frankenstein
Martian Crewmember (uncredited)
Reporter (uncredited)
Martian Crewmember / The Monster (uncredited)
Lieutnenant Denny / Frankenstein (uncredited)
Bikini Blonde (uncredited)