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The working title of this film was Terror. "Kluger" was Charles McGraw's first starring role. RKO contract star Gloria Grahame was first assigned to the part of "Carol," but refused the role and was suspended by the studio. Although Jason Robards is listed as a "technician" in the CBCS, he did not appear in the final film. According to a Hollywood Reporter pre-production news item, the picture was to have been shot at the Los Angeles Civic Center, but no scenes in the final film were set there.