"One evening, professor André Barret sees the author of a murder in the darkness; cafe owner Cordelec is the victim. From then on, his suspicions fall on one of his students who had just arrived in his class, Bernard Cormiere."
Daniel Gélin
as Bernard Cormière
Bella Darvi
as Pascale Barret
François Périer
as André Barret
Jean Brochard
as Investigating judge
Julien Carette
as Grindel
André Valmy
as Rudeau
Julien Verdier
as Lachaume
Guy Tréjan
as Pélissier
François Darbon
as Police commissioner
Madeleine Barbulée
as Madame Lachaume
Gisèle Grimm
as Henriette
Colette Régis
as Madame Bergamier, mother-in-law
Edmond Ardisson
as Tobacconist
Claude Carrère
as Internal
Max Dalban
as Newspaper carrier
Robert Dalban
as Cardelec
Émile Genevois
as Coffee boy
Marcel Pérès
as Agent
Léon Larive
as Left-luggage employee
Susi Jera
as Josette
Victor Vicas
Director
Jean Hougron
Novel
Jacques Companéez
Writer
Joseph Kosma
Music
Jean Feyte
Editor
Pierre Montazel
Director of Photography