A person who had usurped the identity of a famous writer of detective stories was killed in the train. Why and by whom?

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Main Cast: Renée Saint-Cyr, Henri Guisol, Pierre Renoir, Michel Vitold, Raymond Bussières, Alexandre Rignault, Marguerite Pierry, Lucien Gallas, Léonce Corne, Guy Decomble

Director: Louis Daquin

Writer: Marcel Aymé

Editor: Suzanne de Troeye

Cinematographer: Jean Isnard

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