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!
as Santo, el Enmascarado de Plata
as Susana Mendoza
as Ricardo Carbajal
as Gloria Mendoza
as Dr. Karol
as Professor Galvan
as Inspector Fernandez
as Police Chief
as Henchman
as Henchman
as Anciana encuentra cámara
as Doctor
as Wrestler (as Benny Galan)
as Wrestler
as Wrestler
as Velador museo / Museum Caretaker (uncredited)
as Hombre lobo / Wolf man (uncredited)
as Espectador lucha libre (uncredited)
as Ring Announcer (uncredited)
