Poirot searches for priceless jewels belonging to a princess at school in England.
Adam Croasdell, Adam De Ville, Amanda Abbington, Amara Karan, Anton Lesser, Carol MacReady, Claire Skinner, Don Gallagher, Elizabeth Berrington, Georgia Cornick, Georgie Glen, Harriet Walter, Jane How, Jo Woodcock, Katie Leung, Lois Edmett, Miranda Raison, Natasha Little, Pippa Haywood, Raji James, Susan Wooldridge