A person who had usurped the identity of a famous writer of detective stories was killed in the train. Why and by whom?
Cast
Renée Saint-Cyr
Clarisse Coquet
Henri Guisol
Armand Le Noir
Pierre Renoir
Charles de Bruine
Michel Vitold
Nazarian
Raymond Bussières
Griset
Alexandre Rignault
Avril
Marguerite Pierry
Mademoiselle Malvina
Lucien Gallas
Léopold
Léonce Corne
Pincet
Guy Decomble
Unknown
Jean Didier
Francis
Maurice Dorléac
Philosopher
Gabrielle Fontan
Le Noir's concierge
Richard Francœur
Commissioner
Paul Frankeur
Unknown
Germaine Gerlata
Traveler
Jacques Grello
Lost and Found employee
Camille Guérini
Organizer
Marta Labarr
Phyllis
Robert Le Fort
Unknown
Irène Lud
Princess
Roger Maxime
Unknown
Geneviève Morel
Philosopher
Pierre Palau
Chabrol, publisher
Albert Rémy
Henri
Jean Samson
Unknown
André Wasley
Unknown
Colette Wilda
Madeleine
