Agatha Christie’s Murder On The Orient Express is one of the most recognizable detective stories in all of fiction. So much so that Kenneth Branagh decided to remake the classic story and step into the lead role of Hercule Poirot himself. The genre of the “whodunit” is a well-worn story, which contains a ton of plot twists as a central—and typically eccentric—detective uses boundless skills of deduction to determine the culprit of a crime. This video picks apart the essentials of the genre so that after this remake of Orient Express, you’ll be ready for any other Poirot stories—perhaps a sequel adaptation of Death On The Nile—and any other classics of crime fiction.