Le Loup des Malveneur: 1943
France
Black and White
aka The Wolf of the Malveneurs

Director: Guillaume Radot
Cast: Madeleine Sologne, Pierre Renoir, Gabrielle Dorziat

Plot: Reginald de Malveneur is a scientist attempting to discover the secret of total cellular rejuvenation. When a young governess, Monique Valory, arrives at the castle of the Malveneurs, she learns that Reginald has disappeared along with the gamekeeper. With the help of a young painter, Philippe, she begins to suspect that there is something strange at work in the household.