Cora's mother arrives for Matthew and Mary's wedding, but with the couple's relationship under strain will they even make it to the altar? Robert has some shocking news.
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In the hope of financial rescue from her American grandmother, Mary conspires with Violet to make sure Downton puts on a bigger show than ever before.
Edith's big day finally arrives, but will the family be convinced that Strallan's age does not matter? Mary takes matters into her own hands - but the price could be high.
Branson's political views land him in hot water and Sybil's loyalty is tested to the limit. Ethel is torn between head and heart as she makes a decision about her son's future.
An exciting offer for Edith divides opinion. Isobel throws Ethel a lifeline. New maid Ivy is attracting attention below stairs, and Alfred's interest is resented by Daisy.
Tempers fray as Isobel's kind gesture backfires. Branson's decisions are put under scrutiny. As Bates's chance of freedom slips away, he goes to extreme lengths.
Anna's patience is finally rewarded. Edith has an unexpected admirer. Matthew refuses to back down over his concerns. Branson's plans for the christening cause consternation.
The annual cricket match brings out Robert's competitive side. As Violet's great niece Rose arrives, a trip to London reveals there is more to her than meets the eye.
The family receive a warm welcome at Duneagle Castle, visiting Rose and her parents in the Highlands. But there is no disguising the tensions between their hosts. Carson is determined to keep the servants back at Downton working hard, but with a country fair coming up, will some be tempted to push their luck? Could romance be on the cards for Mrs Patmore?