Jean Dréville
Director
Antoine-Louis Dominique
Writer
René Cloërec
Music
André Saint-Germain
Director of Photography
Alexandre Marcus
Makeup Artist
Charles Vanel
Commissioner Perrache of the D.S.T.
Anne Vernon
Lucette Vignon
Jacques Morel
Inspector Paul Duchamp
Maurice Teynac
Kurt Topfer
Henri Crémieux
Saab Astérich
Yves Massard
Inspector Louis Vignon
Robert Porte
Koskah
Marcelle Arnold
Lynda
Berthe Tissen
Mrs. Astérich
Edmond Ardisson
Linda
Roger Bontemps
Naval officer
Jean-Paul Coquelin
Technician from South Tunisian
René Havard
Technician from South Tunisian
Germaine de France
Mrs. Perrache
André Numès
Archivist
Philippe Olive
Journalist
Grégoire Aslan
Inspector Ben Hamman
René Blancard
Inspector Rentier
Marc Arian
Spectator at the cinema (uncredited)
Jean Dréville
Commentator (uncredited)
Pierre Duncan
Beefcake (uncredited)
Bob Ingarao
Radio technician (uncredited)
Julien Maffre
Monegasque policeman (uncredited)
Geneviève Morel
Lady in the cinema (uncredited)
Louis Viret
Jupiter, D.S.T. agent (uncredited)