Agatha Christie’s great-grandson, James Prichard, has opened up about how many more Hercule Poirot movies there might be following A Haunting in Venice. The new Poirot film sees Kenneth Branagh return as the classic detective for a third time, following his portrayal in Murder on the Orient Express and Death on the Nile. Christie penned many Poirot books, with Branaugh’s films barely scratching the surface of his mystery adventures.