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Jean Poiret as Inspecteur Jean Lavardin |
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Stéphane Audran as Madame Cuno |
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Michel Bouquet as Hubert Lavoisier |
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Lucas Belvaux as Louis Cuno |
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Jean Topart as Docteur Philippe Morasseau |
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Pauline Lafont as Henriette |
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Caroline Cellier as Anna Foscarie |
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Josephine Chaplin as Delphine Moreasseau |
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Andrée Tainsy as Marthe |
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Jean-Claude Bouillaud as Gérard Filiol |
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Jacques Frantz as Alexandre Duteil |
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Dominique Zardi as Henri Rieutord, Chef de Poste |
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Henri Attal as L'Employé de la Morgue |
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Albert Dray as André, le Barman |
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Marcel Guy as Le Maître d'Hôtel |
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Jean-Marie Arnoux as Le Client du Café |
| Production | Marin Karmitz | Producer |
| Writing | Dominique Roulet | Novel |
| Camera | Jean Rabier | Director of Photography |
| Sound | Matthieu Chabrol | Original Music Composer |
| Directing | Claude Chabrol | Director |
| Editing | Monique Fardoulis | Editor |
| Writing | Dominique Roulet | Writer |
| Sound | Jean-Pierre Duret | Sound Assistant |
| Camera | Dominique Robert | Grip |
| Sound | Jean-Bernard Thomasson | Sound Engineer |
| Camera | Micheline Pelletier | Still Photographer |
| Production | Sylvie Chevereau-Marchais | Administration |
| Costume & Make-Up | Brigitte Delouis | Makeup Artist |
| Production | Bernard Morel | Unit Manager |
| Lighting | Claude Rouxel | Electrician |
| Costume & Make-Up | Alice Schwartz | Hairstylist |
| Directing | Aurore Chabrol | Assistant Director |
| Writing | Claude Chabrol | Writer |
| Lighting | Maurice Estival | Electrician |
| Lighting | Jean Fleury | Electrician |
| Camera | Jean-Marc Rabier | Assistant Camera |
| Costume & Make-Up | Giselle Hadjadj | Hairstylist |
| Directing | Michel Dupuy | Assistant Director |
| Camera | Jean-Baptiste Dutreix | Key Grip |
| Camera | Michel Thiriet | Camera Operator |
| Directing | Aurore Chabrol | Script Supervisor |
| Directing | Pierre-François Dumeniaud | Assistant Director |
| Editing | Angela Braga-Mermet | Assistant Editor |
| Sound | Michel Ganot | Conductor |
| Production | Marguerite Lemarchand | Production Secretary |
| Art | Elizabeth Desouches | Assistant Production Design |
| Production | Eva Simonet | Publicist |
| Costume & Make-Up | Catherine Bouteille | Costumer |
| Costume & Make-Up | Jacques Clemente | Makeup Artist |
| Art | Pierre Galliard | Property Master |
| Art | Françoise Benoît-Fresco | Production Design |
| Costume & Make-Up | Magali Fustier-Dray | Costume Design |
| Production | Catherine Lapoujade | Production Manager |
