Years later, Sigourney Weaver would state that she was most proud of her work in this film. She worked hard to portray the mindset of an agoraphobic, and has regretted that the movie was lost in a shuffle of thrillers at the time and is not better remembered.
To research her role, Sigourney Weaver consulted with leading forensic psychiatrist Park Dietz, who had interviewed serial killer Jeffrey Dahmer.
(at around 1h 20 mins) Harry Connick Jr. was asked by director Jon Amiel to come up with a slang term for ladies' panties, which ended up as "squirrel covers," an expression he had heard his brother-in-law use.
(at around 47 mins) In the German dubbed version, the line "Heil Hitler" was replaced with "Yes boss."