Patrick Brennan

An outburst threatens Bertie and Edith's relationship, while Mary makes a decision over her feelings for Henry.

The big day has finally arrived for Mrs Hughes and Carson, while Edith is forced to rely on an old friend after she grows weary of her editor's constant insults.

The family open the house up to the public to raise money for charity, inadvertently exposing how little of its history some of its residents know.

Daisy and Molesley sit their exams, Mary receives a surprising invitation and the family witness a tragedy at the racetrack.

The story moves on to 1924, when the first ever Labour government heralds a sea change that is felt throughout the nation - nowhere more so than at Downton.

Choosing a reception venue creates friction between Mrs Hughes and Carson, Anna seeks medical advice and a day out goes horribly wrong very quickly for Mary.