A friend of Miss Marple claims to have seen a murder committed on a passing train, but the police dismiss it, as no body has been found in the train or surrounding area, so the two women begin an investigation of their own.

Amanda Holden, Ben Daniels, Celia Imrie, Charlie Creed-Mills, David Warner, Griff Rhys Jones, Jenny Agutter, John Hannah, Martixell Lavanchy, Michael Landes, Niamh Cusack, Pam Ferris, Rob Brydon, Rose Keegan, Tasha Bertham, Toby Marlow