Following Matthew’s untimely death, new mother Mary is struggling to come to terms with her loss. Robert and Violet disagree on how to bring her through it.

Emerging from her grief, Mary starts to take an interest in the running of the estate, but is met with resistance from Robert. As Molesley’s fortunes worsen, Bates hatches a plan to help him.

An extravagant house party at the Abbey gives the Crawleys a chance to reconnect with old friends.

Amid the fallout of the eventful house party Mary faces a pressing question about her future, Carson reveals surprisingly intimate details of his former life, and a trip to the bright lights of London sees Rose put the reputation of the Crawleys in jeopardy.

Change is in the air as an exciting opportunity for Alfred creates tension between Ivy and Daisy.

A birthday party is planned for Robert, but Rose’s surprise contribution to the event ruffles feathers above and below stairs.

Cora’s playboy brother Harold is in a fix and Robert must travel to America to help bail him out, whilst a new farming venture at Downton sees Blake and Mary forced to put aside their differences. When Violet is taken ill she finds help comes from an unlikely corner.

Rosamund hatches a plan to help Edith out of her predicament, but will Violet see straight through it?

Part 1 of 2. It's summer and as part of Rose’s ‘coming out’ she is to be presented at Buckingham Palace. The family are in London, preparing Grantham House for the busy social program. Not one to miss such a grand occasion, Martha Levinson arrives from New York with Cora’s recently disgraced brother Harold. Both outspoken and larger-than-life, they make quite an impression amongst certa...

Part 2 of 2. It's summer and as part of Rose’s ‘coming out’ she is to be presented at Buckingham Palace. The family are in London, preparing Grantham House for the busy social program. Not one to miss such a grand occasion, Martha Levinson arrives from New York with Cora’s recently disgraced brother Harold. Both outspoken and larger-than-life, they make quite an impression amongst certa...