We return to Downton Abbey in 1925, and secrets and rifts threaten the unity of the family, while those below stairs navigate social changes which put their futures in jeopardy. Mary’s past catches up with her when an unwelcome visitor delivers an ultimatum, and news about the running of Downton Hospital puts Violet on the warpath. Friends of the Crawleys, the Darnleys, have been forced to sell their ancestral home, and Daisy’s good intentions at the Mallerton House auction have disastrous consequences. With friends in debt and fashions changing, Robert is feeling the pressure to make staff cutbacks at Downton. Carson is concerned that Mrs. Hughes is having second thoughts about their impending matrimony, and judgement day finally arrives for Anna and Bates.
An idea of Mary’s gives Anna new hope. Mr. Carson and Mrs. Hughes can’t agree, and Edith is faced with her greatest fear.
An old acquaintance comes to Edith’s aid, while Mr. Carson and Mrs. Hughes’ big day brings an unexpected arrival.
Anna and Mary face a crisis and a figure from the past surprises those above and below stairs.
Violet embroils the Minister of Health in the hospital row but his visit ends in catastrophe. Mary’s suspicions are aroused.
Downton Abbey opens its doors to the public for charity, and tensions between Cora and Violet reach a dramatic climax.
The family face a shocking turn of events at Brooklands race track, while Molesley and Daisy are put to the test.
Romance blossoms but a betrayal of trust threatens the chance of lasting happiness. Thomas considers desperate measures.
The last ever episode of the multi-award winning drama culminates in a breath-taking finale of New Year’s Eve at Downton Abbey.