Synopsis
Having fortuitously discovered a photograph in which Marthe embraces someone unknown, Étienne Dorsay becomes jealous and imagines various stratagems to identify the lover. In the meantime, he and his friends acquire a weekend house for a very low price.
Cast

Jean Rochefort
Etienne Dorsay

Claude Brasseur
Daniel

Guy Bedos
Simon Messina, doctor

Victor Lanoux
Boulifet, aka 'Bouly'

Danièle Delorme
Marthe Dorsay, Étienne's wife

Marthe Villalonga
Mouchy Messina, Simon's possessive mother

Jenny Arasse
Bernadette, designer collaborating with Étienne

Josiane Balasko
Josy, Lucien's girlfriend
Anne-Marie Blot
Marie-Ange, Bouly's ex-wife

Elisabeth Margoni
Daisy, Bouly's fiancée

Pascale Reynaud
Delphine, Étienne's younger daughter

Maïa Simon
Madame Chalamand, Simon's lover
Catherine Verlor
Stéphanie, Étienne's older daughter

Jean-Pierre Castaldi
Bully

Vania Vilers
Banoît, Marthe's lover

Daniel Gélin
Bastien, stage director

Gaby Sylvia
Marie-Christine Bosquet, Daniel's director

Christophe Bourseiller
Lucien

Carole Jacquinot
Mireille, Simon's girlfriend

Claude Legros
Taxi driver

Janine Souchon
Bouly's secretary

Philippe Chemin

Paul Descombes
Marc Françoise
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