Cast
- Guy Tréjan as le commissaire Lambert
- André Thorent as le commissaire adjoint et officier de police Francin.
- Fernand Berset as l'officier de police Abadie
- Bernard Rousselet as l'officier de police Mareuil
- Claude Ruben as le brigadier-enquêteur Leblanc
- Marion Loran as Mlle Moreau
- Raymond Loyer as le commissaire de la police judiciaire Martial