Paul Meurisse
Stanilas Octave Seminario aka 'SOS', détective
Micheline Francey
Muriel Pescara, the daughter
Gilbert Gil
Charles Pescara, the son
Pierre Renoir
Doctor Gérard Pescara, the father
Jean Tissier
Guillaume
Pierre-Louis
Paul Wantz
Junie Astor
Hélène Tassin, nurse
Jean Debucourt
Doctor Vermeulen
Jean Brochard
Investigating judge
Mady Berry
Brigitte Tassin
Pierre Palau
Doorman
Arthur Devère
Lock keeper
Marcel Pérès
Road mender
Sinoël
Gardener
Georges Bever
Baptiste, clerk
Madeleine Suffel
Hotel boss
Michel Seldow
Illusionist Pablo
Marc Arian
(uncredited)
Léon Arvel
(uncredited)
Alfred Baillou
Man (uncredited)
Rivers Cadet
(uncredited)
Marcel Charvey
(uncredited)
Raymond Destac
(uncredited)
Pierre Duncan
(uncredited)
Cécile Eddy
(uncredited)
Henry Gerrar
Concierge (uncredited)
Claire Gérard
Concierge (uncredited)
Colette Mareuil
(uncredited)
Pierre Moncorbier
(uncredited)
Geneviève Morel
Pescara cook (uncredited)
Henri Niel
(uncredited)
Julienne Paroli
Gossip (uncredited)
Marcelle Rexiane
Director (uncredited)
Maurice Salabert
(uncredited)
Germaine Stainval
Gossip (uncredited)
Jean-Marc Tennberg
Agent on duty (uncredited)
Georgette Tissier
Telephone operator (uncredited)
