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The unpublished story by Jack Andrews was entitled "Armored Taxi," which was the film's working title. According to publicity for the film, Brian Donlevy nearly lost two fingers of his left hand when, in a scene, he threw a bottle at Jimmie Dundee, who was a former welterweight boxer, and it exploded. The script was then rewritten to include the fact that Donlevy's hand had to be bandaged. This film bears no resemblance to two other films with the same title: the 1930 Fox film directed by John Ford or the 1959 Warner Bros. film starring Mamie Van Doren.