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Based loosely on the Dostoyevsky novel, The Gambler stars Gregory Peck as a sensitive 19th-century Russian author. His "great sin" is gambling, which starts when he attempts to rescue aristocratic Ava Gardner from the gaming tables. He succeeds, only to lose himself to gambling fever, which costs him his friends, his reputation and his talent. Director Robert Siodmak was never happy with the screenplay for The Great Sinner, constant revisions bloated the film's rough-cut running time to nearly six hours! After Siodmak pared the film down, MGM insisted that the director reshoot the love scenes. Siodmak refused, thus the new sequences were filmed sans screen credit by Mervin LeRoy.