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Theo Durrant, the credited author of the novel The Marble Forest, upon which Macabre is based, is a pseudonym for twelve mystery writers who composed the novel. Those writers are: Terry Adler, Anthony Boucher, Eunice Mays Boyd, Florence Ostern Faulkner, Allen Hymson, Cary Lucas, Dana Lyon, Lenore Glen Offord, Virginia Rath, Richard Shattuck, Darwin L. Teilhet and William Worley. The New York Times review notes that the film's opening features a British narrator; however, the narration was not included in the print viewed. Christine White's character, "Nancy Wetherby," was incorrectly listed in the credits as "Nancy Tyloe." The closing credits featured animated horse-drawn hearses with each of the characters killed in the story listed as "The Dead," and the remaining cast listed as "The Living," as mourners. following the hearses. Mortician "Ed Guigley" was listed with "The Dead" although his character is alive at the picture's close. Technical credits featured cartoon drawings of executions, skeletons and ghosts.
Although a August 12, 1957 Hollywood Reporter news item stated that the film was made "in cooperation with" Bel-Air Productions, Inc., only Susina Associates is listed by contemporary sources as the production company. An exploitation feature of the distribution of the film was the offer of a $1,000 life insurance policy for all patrons, payable in the event of death by fright during the performance of Macabre. According to a contemporary Los Angeles Times article, the only stipulation by the insurance company was that the name of the insurer, Lloyd's of London, not be used in print advertising.