David Suchet, TV’s Poirot, has spent more of his life acting out the plots and dramas created by Agatha Christie than anyone else in the world. Suchet is embarking on a journey to learn more about the woman who created Poirot and whose books remain outsold only by Shakespeare and the Bible. Suchet’s journey takes him to the places Christie lived, the landscapes that inspired her and to meetings with people who knew the woman behind the fame and...