To liven up a night of babysitting, teens Kit (Sarah Lane) and Libby (Andi Garrett) make prank phone calls, dialing up random strangers and saying, "I saw what you did and I know who you are!" Unluckily for them, one of their victims is the deranged Steve Marak (John Ireland), who just finished killing his wife and is coming after them! Joan Crawford co-stars as Marak's love-starved neighbor in this nail-biter from director William Castle. 82 min. Widescreen; Soundtrack: English Dolby Digital mono.