The Murderer Lives at Number 21

Pierre Fresnay

Commissaire Wens

Suzy Delair

Mila Malou

Jean Tissier

Triquet

Pierre Larquey

Mr. Colin

Noël Roquevert

Dr. Linz

René Génin

Alfred

Jean Despeaux

Kid Robert

Marc Natol

Armand

Huguette Vivier

Nurse Vania

Odette Talazac

Madame Point

Maximilienne

Miss Cuq

Sylvette Saugé

Christiane

Louis Florencie

Commissaire Monnet

André Gabriello

Police Officer Pussot

Raymond Bussières

Turelot

Antoine Balpêtré

Albert (uncredited)

Paul Barge

Ernest (uncredited)

Léon Belières

Businessman (uncredited)

René Blancard

Inspector Picard (uncredited)

Lucien Blondeau

Police Prefect Edouard (uncredited)

Louis Denalair

Police Inspector (uncredited)

Géo Forster

Guest (uncredited)

Gustave Gallet

Judicial Police Director (uncredited)

Léon Larive

Mr. Albert (uncredited)

Albert Malbert

Taxi Driver (uncredited)

Maurice Marceau

Bistro Client (uncredited)

Marcel Pérès

Inspector Ballandieu (uncredited)

Martial Rèbe

Cashier (uncredited)

Maurice Salabert

Cycling Police Officer (uncredited)

Evelyne Séjourné

Handmaid (uncredited)

Guy Sloux

Journalist Destirac (uncredited)

André Varennes

Brigadier (uncredited)

Henri Vilbert

Police Officer (uncredited)