In Un meurtre en sommeil, the French Télévisions film adaptation of Agatha Christie's Sleeping Murder, for the season 1 of the Les Petits Meurtres d'Agatha Christie TV series, Guillaume Parisot is a lawyer and the parallel of Walter Fane from the original novel. Guillaume Parisot is portrayed by Christophe Piret.
Guillaume is the village lawyer who transacted the sales of the house which Sacha Poliakov's parents used to own. He tells Sacha and inspecteur Lampion that the house has had various owners over the past many years and that the most notable were the Poliakovs who owned the house some fifteen years previously, notable because the wife, Hélène Poliakov, ran off with another man and abandoned her husband and young child. The husband died of an illness in a hospital later and the child was sent to live with a wealthy aunt in Paris.
Later, when pressed by the police, Parisot admitted that he himself was in love with Hélène. She was engaged to him but left him to marry a Russian. But there was another man, one Mr Balmont who loved her about one year before she left. At the time Hélène disappeared, Parisot had not been seeing her for a long time.
Like Walter Fane, Parisot is also very attached to his mother.
Parisot's house and legal practice is likely to be based in the village of Lebranne. The "to let" sign on the house which Sacha rented (which was her parent's house) is advertised by the Agence Ankri in Lebranne and the village is about 1 km away. At one point Lampion suggests that he and Sacha visit the local village lawyer to find out who had once owned the house.