As reported by Robert Osborne during a TCM airing of the film, Howard Da Silva was originally cast in this film and performed the role in its entirety. However, just before it was distributed, he was denounced as a communist sympathizer in the McCarthy hearings. Producer Howard Hughes (a staunch anti-Communist) ordered all of Da Silva's scenes to be re-shot using Brian Donlevy. So the film was overhauled to incorporate Donlevy and he became the leading man.
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