Guest Stars Caroline O'Neill as Win Thursday Abigail Thaw as Dorothea Frazil Sara Vickers as Joan Thursday Jack Bannon as Sam Thursday Shvorne Marks as Monica Hicks Nell Tiger Free as Bunty Glossop Anya Taylor-Joy as Philippa Collins-Davidson Daniel Ings as Terence Black Lucy Boynton as Petra Briers Simon Kunz as DI Bart Church Ian Peck as Ossie Lloyd Susy Kane as Miss Victoria Danby Imogen Gurney as Edwina Parrish Maya Gerber as Stephanie Hackett Struan Rodger as Wilf Karswell Lynn Farleigh as Tabby Gardiner Tom Prior as Billy Karswell Eve Perry as Antonia Lockwood Emily Warren as Shelly Thengardi Eleanor Northcott as Maud Ashenden Diane Fletcher as Miss Bronwen Symes Desmond Barrit as Stephen Fitzowen Thomas Arnold as Cendree Wyvern Kate Lamb as Daisy Weiss Michael J. Shannon as Nahum Gardiner Uncredited Colin Dexter as Visitor at Museum