The Spiral Staircase (1946) | FILM NOIR/THRILLER | FULL MOVIE

In 1916, beautiful young mute Helen is a domestic worker for elderly, ailing Mrs. Warren, whose two adult sons, professor Albert and impudent womanizer Steven, also live in the Warner mansion. Mrs. Warren becomes concerned for Helen's safety when a rash of murders involving 'women with afflictions' hits the neighborhood. She implores her physician, Dr. Parry, to take Helen away for her own safety. When another murder occurs inside the Warren mansion, it becomes obvious that Helen is in danger.

IMDb: https://www.imdb.com/title/tt0038975