When a young heiress tells Poirot that she may have killed someone, it appears she is being truthful. But Poirot uncovers a conspiracy rooted in the family's history.

Jessica Chastain and Hugh Bonneville guest stars as Poirot looks into the murder of a ruthless American businessman on the Orient Express. The detective makes a huge decision.

Poirot is on board the Orient Express on its journey from Istanbul to London as a personal guest of the train company ...