Don't Bother to Knock is a 1952 American psychological film noir thriller starring Richard Widmark and Marilyn Monroe and directed by Roy Ward Baker. The screenplay was written by Daniel Taradash, based on the 1951 novel Mischief by Charlotte Armstrong. Monroe is featured as a disturbed babysitter watching a child at the same New York hotel where a pilot, played by Widmark, is staying. Her strange behaviour makes him increasingly aware that she is the last person with whom the parents should hav