Rich industrialist Jacques Decret learns his wife Gloria is having an affair with a young actor. For revenge, he bombards her with anonymous letters, convincing her that her lover is the culprit while Gloria desperately seeks a way out.
| Directing | Édouard Molinaro | Director |
| Writing | Frédéric Dard | Novel |
| Camera | Roger Delpuech | Camera Operator |
| Sound | Pierre-André Bertrand | Sound Director |
| Production | Philippe Dubail | Unit Manager |
| Costume & Make-Up | Lina Gallet | Key Makeup Artist |
| Art | Pierre Charron | Set Dresser |
| Writing | Jean Redon | Adaptation |
| Sound | Jacques Thibault | Sound Recordist |
| Production | Robert Sussfeld | Production Manager |
| Art | Jacques Brizzio | Assistant Art Director |
| Production | Pierre Cosson | Unit Production Manager |
| Directing | Claude Sautet | Assistant Director |
| Writing | Jean-Louis Roncoroni | Dialogue |
| Production | Andrée Chassivert | Production Secretary |
| Sound | Richard Cornu | Original Music Composer |
| Costume & Make-Up | Lucienne Magot | Dresser |
| Writing | Frédéric Dard | Adaptation |
| Directing | Claude Levillain | Script Supervisor |
| Camera | Robert Lefebvre | Director of Photography |
| Writing | Frédéric Dard | Dialogue |
| Writing | François Chavane | Adaptation |
| Costume & Make-Up | Simone Knapp | Hairstylist |
| Editing | Robert Isnardon | Editor |
| Editing | Monique Isnardon | Editor |
| Production | Alain Poiré | Producer |
| Production | Irénée Leriche | Production Manager |
| Camera | Vincent Rossell | Still Photographer |
| Costume & Make-Up | Renee Pellemoine | Dresser |
| Camera | Gilbert Sarthre | Assistant Camera |
| Production | François Chavane | Producer |
| Art | Georges Lévy | Production Design |
