As Death on the Nile explains, there is a history between Hercule Poirot (Kenneth Branagh) and Bouc (Tom Bateman) that extends beyond their meeting in Egypt. A sequel to 2017's Murder on the Orient Express, the long-awaited Death on the Nile retcons the famed detective Poirot's history with Bouc, bringing the character back for another adventure.
In Agatha Christie's novels, Bouc is only included in Murder on the Orient Express. Described as a short and stout man, he is the director of the company that operates the train, as well as a friend of Poirot's. Bouc is able to get the detective a second-class cabin on the train. However, in order to accommodate for his space later, Bouc moves to a second-class cabin, giving Poirot a first-class room with more space. After the murder of Edward Ratchett, Bouc aids Poirot in helping him find the killer in Murder on the Orient Express. While his contributions are minimal, he makes sure no one leaves and that justice is served.
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Although Bouc has no role in the original Death on the Nile book, he returns in the 2022 Poirot sequel. While his role in Kenneth Branagh's Murder on the Orient Express remains mostly identical to the novel, Bouc is re-introduced as one of the guests invited to the marriage celebration of Simon and Linnet Doyle (Armie Hammer and Gal Gadot) in Death on the Nile. In a significant change to the novel, Bouc replaces the character of Tim Allerton, as Michael Green's screenplay has him adapt Allerton's entire arc. After the events of Murder on the Orient Express, Bouc explains that his uncle removed him from the train because he didn't help much to solve the murder. Since then, he has
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