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According to a pre-production Hollywood Reporter news item, Lola Lane was originally cast as the female heavy in this picture. Although Hollywood Reporter production charts credit Joseph Neff as film editor, Ernest Nims is listed as editor onscreen. Production charts also list Ray Walker in the cast, but his appearance in the released film has not been confirmed. Although onscreen credits and SAB attribute the screenplay to Lynn Starling and Elliot Paul, a CBCS list dated October 2, 1944 credits Paul Gangelin with screenplay and attributes the story idea to Billy Wilder. A October 16, 1944 pre-release ad for the film in Daily Variety also credits Wilder with the story idea, but the extent of his and Gangelin's contribution to the released film has not been determined. According to a New York Times news item, the ice sequences were filmed at the Westwood Ice Rink in Los Angeles, and rehearsals were held at the Polar Palace in Hollywood. The decision to film at public rinks rather than on a studio sound stage was made because of problems involving the multi-colored ice used in the production.