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