"In a factory working for the National Defense, an employee steals a prototype. In charge of the investigation is Francis Coplan."
Dominique Paturel
as Francis Coplan
Virna Lisi
as Ingrid Carlsen
André Weber
as Legay
Jacques Balutin
as Fondane
Yvonne Clech
as Madame Rochon
Guy Kerner
as Rochon
Roger Dutoit
as Bianco
Eugene Deckers
as Bianco's henchman
Tommy Duggan
as Stratton
Henri Lambert
as Scarpelli
Margo Lion
as Mrs. Slasinska
Jacques Monod
as 'Le vieux'
André Valmy
as Pelletier
Yves Arcanel
as
Marcel Charvey
Dominique Davray
as Prostitute
Albert Dinan
Gisèle Grandpré
Monique Morisi
Alain Nobis
Anna Vallon
Michel Berreur
as Henchman (uncredited)
Charles Bouillaud
as (uncredited)
Willy Braque
Henri Desagneaux
Luce Fabiole
Henri Guégan
as Man on the train (uncredited)
Francis Lax
Daniel Perche
Maurice Labro
Director
Jean Libert
Novel
Pascal Jardin
Screenplay
Pierre Petit
Director of Photography
Jean Mandaroux
Set Decoration
Georges Van Parys
Original Music Composer