Caligula's already chaotic production was complicated by extensive post-synchronization. Although the film was shot in English, the Roman studios were noisy, many supporting performers were Italian, and large portions of the dialogue had to be re-recorded or dubbed after filming. Peter O'Toole, who played the diseased and decadent Emperor Tiberius, was especially reluctant to return for the process. The production eventually tracked him to Canada and, in Guccione's colorful account, 'dragged him in front of a mike' to record the missing lines. Guccione also claimed that O'Toole appeared to be 'strung out on something' and was not sober throughout the filming schedule, although that characterization is a producer's allegation rather than an independently established medical finding. O'Toole had stopped drinking before the shoot, but he openly disliked the project after production and doubted that it would ever be released. His hostility was intensified by the film's transformation from Vidal's controversial screenplay into Brass's violent, sexually explicit spectacle, leaving one of its most celebrated actors detached from the final product even before he had properly seen it.
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