The Strangers in the House (Les Inconnus dans la maison) is a 1942 French crime film by Henri Decoin after the novel by the same name by Georges Simenon in 1940.

Hector Loursat, attorney at law, lives with his daughter, Nicole, in a vast and shabby mansion in a provincial town.

Their conversation with each other is limited, each somehow holding the other one responsible for the situation: Hector Loursat used to be one of the great attorneys until his wife left him for another man eighteen years ago.

Hector soon finds out his daughter has a kind of secret life with a band of young idle bourgeois from the town; they have regular meetings in the attic.

Hector Loursat does not budge, has no questions to ask the witnesses, doesn't seem to be there altogether, to the point where people, and his daughter among them, wonder, with awe, if he is not still drinking.