Clémence Mouson

In Je ne suis pas coupable, the France Télévisions adaptation of Sad Cypress for the TV series Les Petits Meurtres d'Agatha Christie, Clémence Mouson is the parallel of Mary Gerrard in the original novel.

Like Mary, Clémence lives on the property of a wealthy old lady Élisabeth Laroche-Viseul. She is the adopted daughter of Fernand, the gardener, who is the parallel of the lodge keeper Bob Gerrard. Clémence plays much the same role as Mary in the original. The old lady likes Clémence to keep her company and anonymus poison pen letters are sent to Elisabeth' daughter Claire Laroche-Viseul warning that someone is trying to cut in on her claim to her mother's estate. Clémence meets Mathieu Vidal, Claire's fiance, and the two fall in love, much to the chagrin of Claire.

Unlike Mary, there is not much of a mystery to Clémence's relationship with Elisabeth. Here Elisabeth had recorded the fact that Clémence is her daughter in her notebook. Shortly before dying, Elisabeth she asked Claire to take the notebook and also to look after Clémence. Later Clémence's adoptive Fernand also confirmed the facts and the background of her birth. Like Mary, Clémence also made a will to benefit her aunt in Australia. After Elisabeth's death, Claire awarded Clémence 100,000 francs from Elisabeth's estate. In the original, Poirot had to piece together Mary's relationship to Laura Welman through a process of investigation.

Unlike the original, Clémence's death is not arranged so as to cast suspicion on Claire. Here Clémence is simply stabbed to death with a pair of scissors. Claire is arrested on different evidence. In this case, Mathieu Vidal denounced her because he had an argument with Claire where Claire had become violent and had threatened to kill him and Clémence.

Clémence Mouson is portrayed by Lou de Laâge.