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The opening credits appear ten minutes into the film. Throughout the film, the gangsters repeat the slogan "There's no such thing as the Mafia." Although screen credits and reviews list the author of the novel on which the film was based as Evan Hunter, the book was published under Hunter's frequent pseudonym, Ed McBain. Publishers Weekly reported in April 1971 that M-G-M had purchased the film rights to the novel, also entitled Every Little Crook and Nanny, which was not published until March 1972.
As noted in Filmfacts, most scenes were shot in Los Angeles and Naples, Italy. A October 12, 1971 Daily Variety article stated that the studio originally wanted to shoot the scenes of Italy in Sausalito, CA, but realized that Naples would appear more realistic. Hollywood Reporter production charts add Anita Gillette to the cast, but her appearance in the final film has not been confirmed. A modern source adds David Pollock to the cast.
Every Little Crook and Nanny, for which Victor Mature received universally laudatory reviews, was the actor's first major screen role since 1966's After the Fox.