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The film's working title was Hard as Nails. The scene leading up to the climactic showdown between "George Hansen" and "Johnny Crale" is played before the film's titles. Sheb Wooley is best known for his recording of the novelty song "Purple People Eater." Modern sources add Chuck Roberson and Emory Parnell to the cast. According to modern sources, the film was made in ten days for $80,000.
Although screenwriter Ben L. Perry was given screen credit for the screenplay when the picture was initially released, the film was actually written by blacklisted writer Dalton Trumbo, whose credit was officially restored by the WGA in September 2000. According to WGA records, Perry fronted for Trumbo and blacklisted writers John Howard Lawson and Mitch Lindeman on Terror in a Texas Town. Trumbo, who was originally approached by producer Frank N. Seltzer to write the script, was involved in other projects and recommended Lawson and Lindeman, according to a biography of Trumbo. Later, at Seltzer's request, Trumbo rewrote the script.