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The working title of this film was The Riddle of the 40 Naughty Girls. Forty Naughty Girls, which some reviews list as 40 Naughty Girls, was the sixth film in the Hildegarde Withers-Oscar Piper series, and the second film in which ZaSu Pitts appeared as Hildegarde. Before Pitts, Edna May Oliver and Helen Broderick had played the role. According to a Hollywood Reporter news item, Edward Cline replaced Ben Holmes as director. Actor Edward Marr made his screen debut in this production. A Hollywood Reporter news item adds Elizabeth Russell and William Corson to the cast, but their participation in the final film has not been confirmed. For more information on the series, for Penguin Pool Murder and consult the Series Index.