"Léon, a humble civil servant, has the unusual ability to walk through walls, however thick they are. One day, he falls madly in love with a charming hotel thief by the name of Suzan."
Bourvil
as Léon Dutilleul
Joan Greenwood
as Susan
Gérard Oury
as Maurice
Henri Crémieux
as Mr. Lécuyer
Roger Tréville
as Félix Burdin
Jacques Erwin
as Gaston
Frédéric O'Brady
as The Medical Specialist
René Worms
as An Employee at the Ministry
Nina Myral
as Mrs. Eloise
André Dalibert
as
Nicole Riche
as The Lady of the Second
Germaine Reuver
as Mrs. Ménard, the Concierge
Jeanne Véniat
as The South American
Georges Flateau
as Mr Robert
Edmond Beauchamp
as Arturo
Georges Lannes
as The Director of the 'Prison de la Santé'
Marcelle Arnold
as Germaine
Raymond Souplex
as Jean-Paul
Nicolas Amato
as The First Agent (uncredited)
Georgette Anys
as Maria (uncredited)
Alfred Arlais
as (uncredited)
Maurice Biraud
as A colleague of Léon (uncredited)
Gérard Buhr
Marcel Charvey
as The bartender (uncredited)
Dominique Davray
as A model (uncredited)
Skip Farrell
as Maurice (uncredited)
Charlie Fawcett
Fignolita
as The negress (uncredited)
Charles Jarrel
Franck Maurice
as The Second Agent (uncredited)
Marcel Meral
as A Colleague of Léon (uncredited)
Craddock C. Monroe
as Elmer (uncredited)
Alain Raffael
Nicole Rimbaud
Titys
as The Prisoner (uncredited)
Pamela Wilde
as A Model (uncredited)
Payne Williams
as Jean-Paul (uncredited)
Jean Boyer
Director
Writer
Michel Audiard
Robert Giordani
Art Direction
Jacques Bar
Producer
Charles Suin
Director of Photography
Robert Dorfmann
Associate Producer
Claudine Bouché
Editor
Fanchette Mazin
Georges Van Parys
Music