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