Nathalie Revent

Virna Lisi

Acting

Alain Revent

Helmut Berger

Acting

Inspector Leroy

Charles Aznavour

Acting

Dino

Alain Noury

Acting

Jacqueline

Françoise Brion

Acting

Sylvie Revent

Édith Scob

Acting

Vincent

Marc Cassot

Acting

Commissioner Dedru

Yves Brainville

Acting

Professor Richet, psychiatrist

Henri Crémieux

Acting

Doctor Schwartz

André Chanu

Acting

Toxicologist

Georges Berthomieu

Acting

Chemist

Guy Marly

Acting

Maître d'hôtel

Michel Peyrelon

Acting

Judge

Robert Le Béal

Acting

Neighbor

Dominique Marcas

Acting

Maître Wasserman, property administrator

Howard Vernon

Acting

Nicole Gobbi

Production

Jocelyne Jeanssen

Acting

Robert Audran

Acting

Delivery man

Paul Pavel

Acting

Alain's concierge

Robert Berri

Acting

Serge Berry

Acting

Hotel porter

Paul Bonifas

Acting

Elisabetta Fanti

Acting

Alain's friend

Alberto Farnese

Acting

Neighbor witness

Monique Mélinand

Acting

Alain Revent (voice)

Roger Coggio

Acting

(uncredited)

Jacques Castelot

Acting

Police inspector (uncredited)

Jacques Chevalier

Acting