Homicidal

William Castle: [gimmick] In the final reel, when Miriam is about to go into the house for the big climax, there was a one-minute "Fright Break" in which producer/director William Castle advised the audience that anyone too scared to see the climax could go into the lobby and get their money back. For this gimmick, Columbia shipped a cardboard "Coward's Corner" to theaters playing the film. Supposedly, audience members too frightened to see the climax could go to the "Coward's Corner" and wait there until the film ended and the rest of the audience filed past. Apparently no one took the offer.

Toward the end of the film when the police detective and Karl drive to the Hotel Ventura to show the bellboy the photo of Emily, the clock just above the corner drugstore says 8:24 p.m., but when they walk from the car into the hotel, the clock above the registration desk says 7:50 p.m.

At the end of the film Joan Marshall's characters Emily/Warren come out to face the audience, via split screen, and take a bow!