While the plot of the film is consistent with that of the novel there are several changes which are made, mostly to condense aspects of the novel and to add extra resonance for the characters. Several characters from the novel are condensed into one in order to cut down on the number of characters in the film. In addition, in the novel most of the characters, aside from cousin Andrew and Louise, have no connection to Linette, they simply happen to be traveling on the same ship. In order to provide more emotional resonance, and more potential suspects, the film gives every character a connection to Linette and her family. Bouc does not appear in the book, and thus does not die. In the book it is Salome Otterbourne who witnesses the maid's murder and is, in turn, herself killed. Since Bouc does not appear in the book, it is Poirot's friend Colonel Race who acts as sidekick to the great detective. The film also invents all of the prologue to Hercule Poirot's time in Egypt, including the scene where he encounters Simon and Jackie in London, and the flashback to his time in WWI.

Film

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