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Stéphane Audran as Hélène Davile, aka 'Mlle Hélène' |
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Jean Yanne as Paul Thomas, aka 'Popaul' |
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Roger Rudel as Commissioner Grumbach |
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Antonio Passalia as Angelo |
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Mario Beccara as Léon Hamel |
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William Guérault as Charles |
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Pascal Ferone as Father Charpy |
| Sound | Pierre Jansen | Original Music Composer |
| Editing | Jacques Gaillard | Editor |
| Camera | Jean Rabier | Director of Photography |
| Directing | Claude Chabrol | Director |
| Production | André Génovès | Producer |
| Costume & Make-Up | Joseph Poulard | Costume Design |
| Writing | Claude Chabrol | Screenplay |
| Costume & Make-Up | Louis Bonnemaison | Makeup Artist |
| Sound | Guy Chichignoud | Sound |
| Production | Fred Surin | Production Director |
| Camera | Claude Zidi | Camera Operator |
| Art | Guy Littaye | Production Design |
