Bourvil
Léon Dutilleul
Joan Greenwood
Susan
Gérard Oury
Maurice
Henri Crémieux
Mr. Lécuyer
Roger Tréville
Félix Burdin
Jacques Erwin
Gaston
Frédéric O'Brady
The medical specialist
René Worms
An employee at the ministry
Nina Myral
Mrs. Eloise
Nicole Riche
The lady of the second
Germaine Reuver
Mrs. Ménard, the concierge
Jeanne Véniat
The South American
Georges Flateau
Mr Robert
Edmond Beauchamp
Arturo
Georges Lannes
The director of the 'prison de la Santé'
Marcelle Arnold
Germaine
Nicolas Amato
The first agent (uncredited)
Georgette Anys
Maria (uncredited)
Alfred Arlais
(uncredited)
Maurice Biraud
A colleague of Léon (uncredited)
Gérard Buhr
(uncredited)
Marcel Charvey
The bartender (uncredited)
Dominique Davray
A model (uncredited)
Skip Farrell
Maurice (uncredited)
Charlie Fawcett
(uncredited)
Fignolita
The negress (uncredited)
Charles Jarrel
(uncredited)
Franck Maurice
The second agent (uncredited)
Marcel Meral
A colleague of Léon (uncredited)
Craddock C. Monroe
Elmer (uncredited)
Alain Raffael
(uncredited)
Nicole Rimbaud
(uncredited)
Titys
The prisoner (uncredited)
Pamela Wilde
A model (uncredited)
Payne Williams
Jean-Paul (uncredited)