The Spiral Staircase (1946 movie)

The Spiral Staircase is a 1946 American horror movie directed by Robert Siodmak and was based on the 1933 novel "Some Must Watch" by Ethel Lina White. It stars Ethel Barrymore (in her Oscar nominated role), Dorothy McGuire, George Brent, Kent Smith, Gordon Oliver, Rhonda Fleming, Elsa Lanchester and was distributed by RKO Radio Pictures.