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The working title of the film was Gingerbread House. The film was released in England as Whoever Slew Auntie Roo?, which was also the title of the viewed print. Although onscreen credits read "and introducing Chloe Franks," Who Slew Auntie Roo? was not Franks's screen debut. Actor Hugh Griffith's opening onscreen credit reads "Hugh Griffith as the Pigman," but in the closing credits Griffith is identified as "Mr. Harrison." The opening and closing cast credits differ somewhat in order. Throughout the film, "Christopher's" voice-over recites snippets from the Grimm Brothers' fairy tale Hansel and Gretel as he imagines that "Rosie" is a witch planning to eat the children. Rosie's flashback of her daughter's death was filmed in black and white.
As noted in the onscreen credits, the film was shot at Shepperton Studios in England. Curtis Harrington had previously directed Shelley Winters in What's the Matter With Helen?.