Anthology film with three shorts each featuring a famous detective: Monsieur Wens, Lemmy Caution and Maigret.

• Productions Calamy
• Pathé Consortium Cinéma
• Michel Simon
• Raymond Rouleau
• John van Dreelen
• André Dalibert
• René Génin
• Arlette Merry
• Jacqueline Porel
• Maurice Teynac