Tricoche and Cacolet

Tricoche and Cacolet (French: Tricoche et Cacolet) is a 1938 French comedy film directed by Pierre Colombier and starring Fernandel, Frédéric Duvallès and Ginette Leclerc. It is based on an 1872 play of the same title by Ludovic Halevy and Henri Meilhac. It was shot at the Saint-Maurice Studios in Paris. The film's sets were designed by the art director Jacques Colombier.

Synopsis
Two idle Parisian boulevardiers set up a detective agency. They are separately hired by a husband and wife to spy on each other with their respective lovers, while a Turkish Prince has fallen in love with both the wife and her husband's mistress. Eventually everything is resolved to everyone's satisfaction.