This movie was released as "Entrega Immediata" . Cantinflas plays a postman who unknowingly gets involved in a spy caper. This is one of funniest turns. Cantinflas was 52 when he made it, but was still in top comedic form.
A mad female scientist needs Santo's blood for a youth serum; and she has Frankenstein's reliable old monster to help her get it.
Neutron, a wrestler/superhero, investigates a series of murders at a sanitarium.