Set in 1936, this lavish three-part series invites viewers old and new across the threshold of television’s most famous address - 165 Eaton Place. Diplomat Sir Hallam Holland (Ed Stoppard) moves into the iconic townhouse along with his wife, Lady Agnes (Keeley Hawes). With the help of former parlormaid Rose Buck (Jean Marsh), they launch a whole new era for the sumptuous home at the heart of Upstairs Downstairs.