Tell No One (aka Ne Le Dis A Personne)

French thriller directed and co-written by Guillaume Canet. Paediatrician Alexandre Beck (François Cluzet) is still psychologically damaged after the murder of his wife Margot (Marie-Josée Croze) eight years ago. Believed to be the work of a serial killer, Margot's case is reopened when two new bodies are discovered near to where she was murdered.

When Alexandre receives an email showing a woman who looks strikingly similar to his deceased wife and is asked to tell no one, his investigation is hampered when he becomes the prime suspect in his wife's murder.