In the year before WWII, 165 Eaton Place reopens its doors and welcomes viewers back into the lives of its inhabitants, upstairs and down. Lady Agnes and Sir Hallam’s family is now complete with the addition of two small children, but Sir Hallam is drawn into dangerous waters by his preoccupation with the threat of Nazi Germany and the return of troubled Lady Persie. Lady Agnes catches the eye of charismatic American multi-millionaire Casper Landry, and Sir Hallam’s aunt, Dr. Blanche Mottershead, has made herself comfortable in the house after Lady Maud’s death. Meanwhile, life downstairs adjusts to the absence of Rose and the addition of the spirited new nursery maid, Beryl. With upstairs and downstairs harboring life-changing secrets, and the menace of war creeping ever closer, the smooth running of Eaton Place threatens to come to a halt.
Life, love, and international politics come to a boil at 165 Eaton Place. Keeley Hawes (Wives and Daughters), Ed Stoppard (Zen), and Claire Foy (Little Dorrit) return for Season 2, with guest stars Alex Kingston (ER) and Emilia Fox (David Copperfield).