1925. Big changes are afoot. Robert anticipates having to cut costs, and reduce the size of the staff, which worries Carson. Mrs Hughes is nervous about being embarrassed when performing her wifely duties when married to Carson, and asks Mrs Patmore to sound him out; after much embarrassment, Carson says he expects them to have a full marriage, which reassures Mrs Hughes. The local hospital is threatened with a take-over by the larger County Hospital; the board is split, with Violet objecting, and Isobel approving in the name of efficiency. A former chambermaid, Rita Bevan, turns up trying to blackmail Mary by revealing her tryst with Lord Gillingham. Mary refuses to pay, but Rita confronts Robert, who buys her off with £50 instead of the £1,000 she wanted, and gets a signed confession to prevent further blackmail. He admires Mary's pluck, and approves of her taking over Tom's job as the estate's Agent.Sergeant Willis tells Bates and Anna that a woman has confessed to killing Green, and the matter is closed. Anna is upset at not having a child; twice she was convinced she was pregnant, but it was a miscarriage each time. Edith plans to spend more time in London, and be more hands-on with the publishing business. The family attend an auction at a neighbouring estate which is being sold off. Daisy unwisely confronts the new owner because her father-in-law Mr Mason may lose his farm, but this backfires, and she only succeeds in angering him. Although she is liable to dismissal, Cora keeps her on. The owner tells Robert that great estates like theirs are on the way out, and advises him to sell up too.

May 1925. Cora, told by Mrs Patmore that Mrs Hughes is unhappy with having her wedding breakfast in the hall, forces a meeting with the family so that Mrs Hughes can explain, and supports her, so Carson gives in. Violet tries to get Robert to support her view on the hospital merger; at a meeting of the Board things get nasty, and Isobel is annoyed enough to be rude to Dr Clarkson. Edith has more arguments with the publisher of her magazine, and he walks out. Fortunately, she meets an old acquaintance, who helps her produce the next issue. Anna is pregnant, so Mary plans to take her to the doctor in three months time. Thomas travels to be interviewed by an eccentric widower, Sir Michael Reresby (Ronald Pickup) in decrepit Dryden Park, but declines the position.Violet's butler, Spratt, is behaving strangely, which catches Denker's attention. When Sergeant Willis reveals that Spratt's nephew has escaped from prison, Denker is sure that Spratt has helped him, and can now hold that over him. Daisy hopes that Mr Mason can take over the Drewes' farm, but jumps the gun in believing that Cora has already arranged it. Mr Carson and Mrs Hughes are married in the church. At the wedding breakfast in the village school, Tom Branson and his daughter arrive unexpectedly from Boston; he announces he feels Downton is his home, and wants to stay.