Générique complet
Les Durs à cuire (Comment supprimer son prochain sans perdre l'appétit)
Jean Poiret
Louis
Roger Pierre
Germain Lormond
Michel Serrault
Rossignol, private detective
Mireille Darc
Josette
Stéphane Audran
Rika Lormond
Claude Chabrol
Psychiatrist
Hubert Deschamps
Robert Darsac
Olivier Hussenot
Theater director
Max Montavon
Homosexual
France Rumilly
Raymonde
Fernand Sardou
Inspector
Marcel Achard
Self (uncredited)
Philippe Castelli
Critic (uncredited)
Jean Degrave
Prosecutor (uncredited)
