David Walliams and Jessica Raine star in this six-part BBC series based on Agatha Christie's crime-solving couple Tommy and Tuppence. Set in post-war 1950s Britain, Tommy and Tuppence Beresford (Walliams and Raine) are humble beekeepers with a passion for mystery. As their everyday excursions find them in the middle of intriguing crimes, the Beresfords work together to solve seemingly unsolvable crimes. The episodes are: 'The Secret Adversary - Part 1', 'The Secret Adversary - Part 2', 'The Secret Adversary - Part 3', 'N Or M? - Part 1', 'N Or M? - Part 2' and 'N Or M? - Part 3'.