"Alfred Hitchcock Presents" Fog Closing In (1956)

Mary Summers does not want to stay alone at home when her husband Arthur goes away on business. She asks that her family be allowed to stay with her. Arthur refuses her request. While Arthur is away an escaped mental patient breaks into the house. Surprisingly, the mental patient gets along with Mary. She is not afraid of him. She tells him about a dream she has had where someone follows her up the stairs. When the police arrive, the mental patient makes an escape. After the the police leave, Mary hears someone coming up the stairs just like in her dream. She find's Arthur's pistol as the door opens. At the door is Arthur. He came home early when he heard about the escape at the asylum. Even though she knows its him, Mary shoots him. She then calls her family and tells them she is coming home.