Cast
Roger Coggio
Alain Revent (voice)
Jacques Chevalier
Police inspector (uncredited)
Édith Scob
Sylvie Revent
Howard Vernon
Maître Wasserman, property administrator
Alberto Farnese
Alain's friend
Helmut Berger
Alain Revent
Alain Noury
Dino
Jacques Castelot
(uncredited)
Charles Aznavour
Inspector Leroy
Henri Crémieux
Professor Richet, psychiatrist
Paul Bonifas
Hotel porter
Guy Marly
Chemist
Monique Mélinand
Neighbor witness
Françoise Brion
Jacqueline
Marc Cassot
Vincent
Yves Brainville
Commissioner Dedru
Dominique Marcas
Neighbor
Nicole Gobbi
Paul Pavel
Delivery man
Virna Lisi
Nathalie Revent
André Chanu
Doctor Schwartz
Robert Le Béal
Judge
Serge Berry
Michel Peyrelon
Maître d'hôtel