Frenzy actual London serial murder cases: the Christie murders in the early 1950s, and the Jack the Ripper murders in 1888. Barry Foster has said that, in order to prepare for his role, he was asked by Hitchcock to study two books about Neville Heath, an English serial killer who would often pass himself off as an officer in the RAF. "Frenzy" was the third and final film that Hitchcock made in Britain after he moved to Hollywood in 1939. The other two were "Under Capricorn" in 1949 and "Stage Fright" in 1950 (although there were some interior and exterior scenes
The Dad Who Knew Too Little Ted and Alice, a reference to the film of the same name that Gould starred in. "The Simpsons" cast member Hank Azaria provided the voice of Dexter Colt, basing it on actor Robert Stack who has played several detectives and agents. Kirkland was enthusiastic about directing the episode as he enjoys film noir detective films and is a big fan of actor Humphrey Bogart, who has appeared in many films of the genre. Kirkland based the design of Colt on Robert Mitchum, who, in addition to being a film noir actor, played a detective in the 1991 film "Cape Fear",