"A playwright has to murder if he does not want to be murdered."
Jean Poiret
as Louis
Roger Pierre
as Germain Lormond
Michel Serrault
as Rossignol, private detective
Mireille Darc
as Josette
Stéphane Audran
as Rika Lormond
Claude Chabrol
as Psychiatrist
Hubert Deschamps
as Robert Darsac
Olivier Hussenot
as Theater director
Max Montavon
as Homosexual
France Rumilly
as Raymonde
Fernand Sardou
as Inspector
Marcel Achard
as Self (uncredited)
Philippe Castelli
as Critic (uncredited)
Jean Degrave
as Prosecutor (uncredited)
Jacques Emmanuel
Dialogue
Adaptation
Jack Pinoteau
Michel Lebrun
Novel
Director
