On screen
Cast
29 credited performers
Virna Lisi
Nathalie Revent
Helmut Berger
Alain Revent
Charles Aznavour
Inspector Leroy
Alain Noury
Dino
Françoise Brion
Jacqueline
Édith Scob
Sylvie Revent
Marc Cassot
Vincent
Yves Brainville
Commissioner Dedru
Henri Crémieux
Professor Richet, psychiatrist
André Chanu
Doctor Schwartz
Artwork unavailable
Georges Berthomieu
Toxicologist
Guy Marly
Chemist
Michel Peyrelon
Maître d'hôtel
Robert Le Béal
Judge
Dominique Marcas
Neighbor
Howard Vernon
Maître Wasserman, property administrator
Nicole Gobbi
Character not listed
Artwork unavailable
Jocelyne Jeanssen
Character not listed
Artwork unavailable
Robert Audran
Character not listed
Paul Pavel
Delivery man
Artwork unavailable
Robert Berri
Alain's concierge
Serge Berry
Character not listed
Paul Bonifas
Hotel porter
Artwork unavailable
Elisabetta Fanti
Character not listed
Alberto Farnese
Alain's friend
Monique Mélinand
Neighbor witness
Roger Coggio
Alain Revent (voice)
Jacques Castelot
(uncredited)
Jacques Chevalier
Police inspector (uncredited)