Character: Mary Debenham
Directed by: Philip Martin
Written by: Agatha Christie (novel), Stewart Harcourt
Produced by: Karen Thrussell
Other cast: David Suchet, Tristan Shepherd, Sam Crane, Toby Jones, Brian J Smith
Episodes: 12x03
Original airdate: July 11, 2010
Episode title: "Murder on the Orient Express"
Genre: Crime, Drama, Mystery
Running time: 1h 29min

Poirot investigates the murder of a shady American businessman stabbed in his compartment on the Orient Express when it is blocked by a blizzard in Croatia.