Trailer
Images
 | Virna Lisi as Nathalie Revent |
 | Helmut Berger as Alain Revent |
 | Charles Aznavour as Inspector Leroy |
 | Alain Noury as Dino |
 | Françoise Brion as Jacqueline |
 | Édith Scob as Sylvie Revent |
 | Marc Cassot as Vincent |
 | Yves Brainville as Commissioner Dedru |
 | Henri Crémieux as Professor Richet, psychiatrist |
 | André Chanu as Doctor Schwartz |
 | Georges Berthomieu as Toxicologist |
 | Guy Marly as Chemist |
 | Michel Peyrelon as Maître d'hôtel |
 | Robert Le Béal as Judge |
 | Dominique Marcas as Neighbor |
 | Howard Vernon as Maître Wasserman, property administrator |
 | Nicole Gobbi |
| Jocelyne Jeanssen |
| Robert Audran |
 | Paul Pavel as Delivery man |
| Robert Berri as Alain's concierge |
 | Serge Berry |
 | Paul Bonifas as Hotel porter |
| Elisabetta Fanti |
 | Alberto Farnese as Alain's friend |
 | Monique Mélinand as Neighbor witness |
 | Roger Coggio as Alain Revent (voice) |
 | Jacques Castelot as (uncredited) |
 | Jacques Chevalier as Police inspector (uncredited) |
| Directing | |
| Sergio Gobbi | Director |
Writing | |
| Dominique Fabre | Novel |
| Sergio Gobbi | Writer |
| André Tabet | Writer |
| Georges Tabet | Writer |
Production | |
| Sergio Gobbi | Producer |
Camera | |
| Daniel Diot | Director of Photography |
Production | |
| Ugo Santalucia | Producer |
Editing | |
| Gabriel Rongier | Editor |
Art | |
| Pierre Guffroy | Art Direction |
Costume & Make-Up | |
| Valérie Dijon | Makeup Artist |
| Marie-Madeleine Paris | Hairstylist |
Directing | |
| Silla Bettini | Assistant Director |
| Patrick Jamain | Second Assistant Director |
| Bernard Quatrehomme | First Assistant Director |
Editing | |
| Janette Kronegger | Assistant Editor |
Sound | |
| Mario Bua | Orchestrator |
| Maurice Coignard | Orchestrator |
| Georges Garvarentz | Original Music Composer |
