Madame de Saint-Langis

In La Maison du péril, the France Télévisions adaptation of Peril at End House for the TV series Les Petits Meurtres d'Agatha Christie, Madame de Saint-Langis is the wife of the famous aviator Guillaume de Saint-Langis who is the parallel of Michael Seton. Madame de Saint-Langis has no parallel in the original novel as Michael Seton is not married. Madame de Saint-Langis is portrayed by Laure Sirieix.

Madame de Saint-Langis suspected that her husband was pursuing a relationship with another woman. There were press rumours that he was planning to divorce his wife to marry someone else. Madame de Saint-Langis suspected that the woman was Joséphine de Vilmarais. Accordingly, she hired a private investigator to keep watch over and report on Joséphine. This investigator successfully infiltrated Joséphine's circle of friends under the name Suzanne and using the cover of acting as a model for Joséphine's photographer brother Abel de Vilmarais.