Adaptations of Agatha Christie's works almost always take some creative liberties to make them feel fresh and modern — some for the best, others woefully misguided. Warner Bros., for example, set Murder in Three Acts in the 1980s and gave Belgian sleuth Hercule Poirot a computer, which was somehow too formidable for his little grey cells to comprehend. Poirot, ITV's popular television series starring David Suchet, frequently altered entire stories. Even Billy Wilder's 1957 film Witness for the Prosecution, which Christie reportedly called her favorite adaptation of any of her works, includes an entirely new character meant to add another dimension to the protagonist's personality.

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