Hammer House of Horror (1980)

S01E08 Children of the Full Moon

Tom Martin borrows a countryside cottage from a friend for a getaway with his wife, Sarah. However, as they travel, Tom loses control of the car, which careens off course. They end up at a secluded house in the woods, where they encounter eight charming Hungarian children and their caregiver, Mrs. Ardoy. That evening, they have an unforgettable experience that will profoundly impact their lives.