A new development stuns the family. Sybil and Branson try to keep their secret safe. Carlisle puts Anna in a difficult position; Bates is left reeling from the news about Vera, and Thomas embarks on a new money-making scheme.
Isobel has plans for Downton to continue to help the war wounded in some way after Robert's announcement that the ceasefire will begin on Nov. 11.
Spanish flu reaches Downton, and desperate Thomas looks for a way to re-establish himself. Ethel faces a dilemma when the Bryants return with a heartbreaking proposition. Decisive, Anna forces Bates to think about their future.