Peter Lorre is the witty shyster-detective with the singular, hypnotic voice. The fact that he doesn't sound at all Mexican makes his portrayal even sillier.
Paul Henreid directs this uproarious Robert C. Dennis teleplay of an Alec Coppel farce.
This could easily be adapted as a full-length present-day movie. Losing a corpse is such an offensive, unspeakable matter, in real life, that it is always a popular comedic device, onscreen. The facetious handling of international border issues helps to lighten the tension over current security and immigration debates.