Don't Bother to Knock is a 1952 American thriller film starring Marilyn Monroe and Richard Widmark, directed by Roy Ward Baker and written by Daniel Taradash.
Monroe is featured as a disturbed babysitter watching a child at the same New York hotel where a pilot (Widmark) is staying. Her strange behavior makes him increasingly aware that Nell is the last person the parents (played by Jim Backus and Lurene Tuttle) should have entrusted with their daughter.
Lyn Lesley, the bar singer at New York's McKinley Hotel, frets about the impending arrival of her boyfriend, airline pilot Jed Towers. Lyn had mailed Jed a letter ending their six-month relationship, and when Jed questions her, she explains that she is leaving him because he lacks an understanding heart.
Meanwhile, elevator operator Eddie introduces his shy niece, Nell Forbes, to guests Peter and Ruth Jones as the babysitter he has arranged for their daughter Bunny. The Joneses, who are dining in the hotel's banquet hall, bid...