The Grantham family put all their troubles from the last series behind them and head to their summer break at Duneagle Castle in the Scottish Highlands in this special Christmas episode.
Finally, Mr Bates is freed from prison, meaning that he can now be reuinited with Anna. The two embrace, and arriving back at Downton, everyone is excited to see him back.
Anna has being doing her best Miss Marple impression throughout this series as she tries to free Mr Bates and she finally uncovers some crucial evidence.
The day has finally arrived, as Lady Sybil goes into labour. A concerned Branson is by her bedside, but he's desperately worried when she begins showing symptoms of eclampsia.
Anna is heartbroken that Bates no longer seems to be writing to her. But it turns out that it is in fact Bates who believes she's given up on him due to her not coming to visit him.
Everyone at Downton is preparing for the wedding of Lady Edith to Sir Anthony Strallan, but the Dowager still hopes she'll realise that he's too old for her.
Downton Abbey is hosting a lavish Christmas party, yet despite being the season of goodwill, tensions are rife and Bates's arrest for the murder of his ex-wife has cast a shadow over the festivities.
Sybil and Branson run away together, but Mary and Edith are in hot pursuit and convince Sybil to go back home with them, although she vows she will stay true to Branson.
A badly burned Canadian officer arrives at Downton to convalesce and confesses to Edith that he is really Patrick Crawley, the former heir who was supposed to have drowned on the Titanic.
Downton prepares for a concert to boost the morale of the convalescing officers and the tension between Isobel and Cora increases when Isobel finds out she has been overruled.
In April 1917, Matthew, who is now a Captain, returns home temporarily for a recruitment drive and Carson tells Mary that if she loves him she should let him known before it is too late.
The residents of Downton Abbey are fully immersed in the horrors of World War I as they prepare for a concert to help the village hospital prepare for war casualties.
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