Trivia

Sonny Macgregor quotes from Henry VI, Part III, Act III Scene ii: "I'll play the orator as well as Nestor, Deceive more slyly than Ulysses could, And, like a Sinon, take another Troy."

The dowdy mystery novelist D. Mandeville is clearly a caricature of Agatha Christie.

Kenneth Kove appears uncredited as the gentleman who lets down the police car's tire.

When Sonny Macgregor speaks Gaelic, he just names the Welsh town Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch.

The police call sign used is the now obsolete "G for George" which has been replaced by the international "G for Golf".