When several women are found mutilated and murdered, the Paris police are baffled as to who the killer may be. All evidence points to Dupin, but soon it becomes apparent that it is someone (or something) stronger and deadlier than a human.

An American cowboy living in Mexico discovers his cattle is being eaten by a giant prehistoric dinosaur.

A female version of the man in the iron mask. In this version the mask is put on a princess (patricia medina) rather than a prince as in the original book by Alexander Dumas.