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.
Karl Malden
Dr. Marais
Claude Dauphin
Insp. Bonnard
Patricia Medina
Jeanette
Steve Forrest
Prof. Paul Dupin
Allyn Ann McLerie
Yvonne (as Allyn McLerie)
Anthony Caruso
Jacques the One-Eyed