Fog Closing In

S2 E2: 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 police leave, Mary hears someone coming up the stairs just like in her dream. She find's Arthur's pistol as the door opens...