All aboard the murder train! This week, the Roundtablers set off from Istanbul with Hercule Poirot and a star-studded cast to review Murder on the Orient Express. This 1974 classic, based on Agatha Christie’s 1934 novel, was written by Paul Dehn and directed by Sidney Lumet. Each week one of the Story Grid Editors—Jarie Bolander, Valerie Francis, Anne Hawley, Kim Kessler, or Leslie Watts—pitches a film as an example of a significant story principle. The rest of us explore different aspects of the principle so we can all understand it better.