Irresistible premise (which could easily be adapted to today's technology) is well-executed in this tense if overextended thriller. William Castle throws you a little off at the start with playful music and young girls as the leads, but then he recreates the shower murder scene of "Psycho" - and outdoes it in viciousness! The two girls, and especially Andi Garrett as Libby, are natural and believable and not very cutesy (though they are cute!); John Ireland is scarily convincing as the baddie. Joan Crawford has a secondary role. *** out of 4.