In Meurtre à la kermesse, the French Télévisions film adaptation of Agatha Christie's Hallowe'en Party, for the season 2 of the Les Petits Meurtres d'Agatha Christie TV series, Dr Geneviève Petit is the wife of Dr Petit. Like her husband, she is also a doctor. She also helps her husband with his project to help foreign refugees settle down in France. Geneviève Petit is portrayed by Isabelle Goethals Carre. Geneviève Pbeli's plot role is unique to the adaptation and there is no parallel to her in the original novel.
Laurence believes that Dr Petit would know about Olga Semirov since she had come from Czechoslovakia to work in France. At the meeting, Dr Petit at first denies knowing Olga but Geneviève tells Laurence that Olga and her friend Svetlana Navratil were among the people they helped. They arrived in late 1957 or early 1958 and the Petits helped them find a job and lodgings.
Believing that Petit is holding something back, Laurence breaks into Petit's office by night. He meets Geneviève who tells him that she too had the habit of going through her husband's things, in her case out of jealousy because her husband had the habit of having affairs with the foreign girls whom he helped. In going through his things, she found something else: the essay written by Luisa Ortega in which she claimed to have witnessed the murder of an actress. This gives Laurence enough to obtain a warrant for Dr Petit's arrest.