Edith is enthusiastic about her wedding and hopes to convince her family that Strallan's age does not matter. With Downton's finances dire because of Robert's actions, Mary takes matters into her hands -- but the personal price may be high.
The future of Downton is unsure; Mary conspires with Violet to put on a grand party.
Branson's political views land him in hot water, and Sybil's loyalty is tested to the limit. Meanwhile, Ethel is torn between head and heart as she makes a difficult decision about her son's future. Elsewhere, Anna is dispirited at Bates' silence.