While Drake's one-time colonel returns to London in order to redress the unfair treatment soldiers have received, Reid and his team investigate a series of robberies.
Audrey and the others investigate a Troubled event which takes them to a supposedly haunted house... which traps them inside.
It is now Christmas, 1919, just a little over a year since the end of WWI. The Crawley family intend to make it a lavish affair for themselves and their guests, even though the arrest of John Bates, for the murder of his wife, Vera, causes a lot of tension in the household as everyone awaits the outcome of his trial, especially his new wife, Anna.
Problems are brewing for Violet as she is more than a little unsure of her daughter, Rosamund's new beau, who seems almost a little too good to be true and strife continues for Lady Mary and Sir Richard after yet another confrontation between the two.moreless
It is now early 1919, and with the war over, the residents of Downton Abbey slowly start to get their lives back in order. Just as it is thought that there cannot be more problems concerning Vera, Bates learns that something else has arisen and he's not sure how to deal with it. Meanwhile, Sir Richard Carlisle uses Anna in a manner which puts her in a very difficult position. For Thomas, the end of the war means yet more ways to make money. And, for Sybil and Branson, they must try to keep their secret for as long as possibles when some totally unexpected news leaves everyone reeling.moreless
It is 1918, and with the end of the war in sight, it looks as though it won't be too long before life can return to relative normality at Downton Abbey, however, Cora and Isobel clash once more over what is to be done with the house when the Armistice is declared.
A Canadian officer arrives at Downton to assist in his return to health but some of the things he imparts to Lady Edith could cause problems for the Crawley family. Meanwhile, Bates once again finds that he has to deal with Vera and must travel to London to do so. His Lordship tells him to keep calm, but will he be able to do so?
Ethel is struggling as a new mother but is receiving a lot of help and support from Mrs. Hughes until Mr. Carson finds out, which may possibly be problematic for all concerned.moreless
Lord Grantham receives some terrible news from the front line which will impact on everyone at Downton.
It looks as though the future of the entire family could be under threat as the greedy Vera Bates threatens to expose all the secrets that she knows about the Crawley family. Can Lady Mary stop her, using her connection with Sir Richard Carlisle before it's too late and what will happen if she doesn't?
For Daisy, life is complicated enough without everything else that is going on as she feels caught up in a whirlwind with regard to her relationship with William.moreless
It is now April, 1917. The First World War thunders on and Mr. Carson finds himself under extreme pressure at Downton trying to run the household with so many of the male staff absent in the service of their country.
Lord Grantham's new valet, Lang, has recently returned from active duty and is suffering in a way that only the harsh Miss O' Brien seems to understand. Meanwhile, former footman, Thomas, wishes to return to the household and finds himself working alongside Lady Sybil, now a nurse, at the local hospital.
Sir Richard Carlisle makes himself unknown enemies out of Violet and her daughter, Rosamund. Their mistrust of him is magnified when they overhear a conversation between himself and Lavinia. Do this relatively unknown pair have a secret which they are trying to hide or is it something else entirely?moreless
Damon Morton is on trial for murder, but his strange hold over those he knows makes securing a conviction problematic.
When Susan Harrow does not come home, her mother reports her missing to the police. Her body is later discovered on waste land and a murder investigation is launched, once again headed by Det. Supt. Walker. There is later a second murder and they know that they have a serial killer on their hands.moreless