Lucy discovers the origins of Agatha's most famous play, "The Mousetrap."
Agatha Christie: Lucy Worsley on the Mystery Queen
Lucy boards the SS Sudan, the paddle steamer that inspired "Death on the Nile."
Following the discovery of her abandoned car, the police launch a search for Agatha.
In the wake of her divorce, Agatha takes a trip on the Orient Express.
Lucy meets Agatha's great grandson, James Prichard, to discuss Agatha's upbringing.
Lucy and Jamie discuss "The Mysterious Affair at Styles," and Poirot's unique qualities.