as Le commissaire Basquier

as Maître Berthet, avocat

as L'inspecteur Paulan

as Rose Muchet, une prostituée

as Denise Prévost, la jeune fugueuse

as Madeleine, la secrétaire du commissaire Basquier

as Dora Bourbon, une victime du sadique

as Maurice Petrosino, un suspect

as Mme de Sannois, une toxicomane

as L'inspecteur Mauduit

as Mme Prévost, la mère de la jeune disparue / Madame Prévost (uncredited)

as La concierge chargée des fouilles corporelles

as Le directeur de la Police Judiciaire

as Binet, le chimiste de la Police Judiciaire

as Le commissaire Husson - de la Mondaine

as Le docteur Martin, le médecin légiste

as Gégène, le vieux voyou écroué

as Monsieur Prévost

as 'Grand-père', l'expert graphologue

as Le cafetier (uncredited)

as (uncredited)

as L'inspecteur qui se fait engueuler par le patron (uncredited)

as (uncredited)

as Le secrétaire de Maître Berthet (uncredited)

as (uncredited)

as Un inspecteur (uncredited)

as Le juge d'instruction (uncredited)

as Un prostituée (uncredited)

as Un interne (uncredited)

as Le serveur de l'auberge (uncredited)

as (uncredited)

as Jean, l'employé du salon de coiffure (uncredited)

as Un ouvrier (uncredited)

as Un employé de l'identité judiciaire (uncredited)

as (uncredited)

as Un client (uncredited)

as (uncredited)

as (uncredited)

as Un inspecteur (uncredited)

as (uncredited)

as (uncredited)

as (uncredited)

as Un interne (uncredited)

as (uncredited)

as (uncredited)