Is There Anybody There?
6/24/1976
Imdb: tt0269374
Tmdb: 365268
Popularity: 1.762
Vote: 7/10 (1)

A beautiful woman, Kate (Tina Grenville), is released from a sanatorium unaware that while she was away her husband John (George Lazenby) has begun an affair with her sister Marianne (Wendy Hughes). The two sisters live together in a creepy apartment block while John is away, and find themselves stalked by some mysterious strangers.