El Santo, the masked Mexican wrestler, investigates a series of kidnappings. He discovers that the mysterious Doctor Caroll is using the victims as part of his experiments to develop an army of monsters. Naturally, El Santo is able to overcome them all - with wrestling!
Santo, el Enmascarado de Plata
Susana Mendoza
Ricardo Carbajal
Gloria Mendoza
Dr. Karol
Professor Galvan
Inspector Fernandez
Police Chief
Henchman
Henchman
Anciana encuentra cámara
Doctor
Wrestler (as Benny Galan)
Wrestler
Wrestler
Velador museo / Museum Caretaker (uncredited)
Hombre lobo / Wolf man (uncredited)
Espectador lucha libre (uncredited)
Ring Announcer (uncredited)