Peeping Tom

Loner Mark Lewis works at a film studio during the day and, at night, takes racy photographs of women. Also he's making a documentary on fear, which involves recording the reactions of victims as he murders them. He befriends Helen, the daughter of the family living in the apartment below his, and he tells her vaguely about the movie he is making. She sneaks into Mark's apartment to watch it and is horrified by what she sees -- especially when Mark catches her.Peeping Tom featuring Karlheinz Böhm and Moira Shearer is free on Popcornflix, free on Tubi TV, available for rent or purchase on iTunes, and 2 others. It's a cult and drama movie with a very high Rotten Tomatoes (critics) score of 96% and a high IMDb audience rating of 7.7 (27,869 votes).