Plot and castWhen two mischievous teens, Kit (Sara Lane) and Libby (Andi Garrett) are home alone with Libby's younger sister, Tess (Sharyl Locke), they begin randomly dialing telephone numbers and telling whoever answers: "I saw what you did, and I know who you are." One call is placed to Steve Marak (Ireland), a man who has recently murdered his wife (Joyce Meadows) and disposed of her body in the woods. Believing his crime is known, he decides to track down the girls and silence them. Neighbor Amy Nelson (Joan Crawford) is in love with Marak and has been trying to woo him away from his wife. She inadvertently saves Libby from being killed and is stabbed to death by Marak. He then closes in on the girls but their parents and the police arrive in time to stop him from committing another homicide. Others in the cast include Patricia Breslin, John Archer, and John Crawford.
Production notesAdvertisements for the movie read, "William Castle warns you: This is a motion picture about UXORICIDE!" and, in an early trailer for the film, Castle advised the audience that a section of the theater would be installed with seat belts for audience members "who might be scared out of their seats". The advertised gimmick was abandoned prior to the release of the film and never actually used.
ReceptionSaturday Review noted, "Unfortunately, there is little for the eye, ear, or mind in [the film]...The call, from teen-age pranksters [Lane and Garrett] probably seemed like a good "gimmick" on which to base an entire film. It isn't."
Variety commented, "[The film] is a well-produced, well-acted entry in the suspense-terror field...[the] slightest gesture or expression of [Crawford] conveys vivid emotion."
This was remade for TV in 1988 with Robert Carradine, David Carradine, Tammy Lauren and Shawnee Smith.