Rose's father-in-law invites the Crawleys to a grouse shooting party, while Mary fights to clear Anna's name in this special episode of the period drama.
The storm clouds that have been gathering over Anna and Bates finally burst. Meanwhile, Robert comes to a realisation.
Relations between Robert and Cora are strained. Edith receives some terrible news and decides to take drastic action.
Rose is delighted to introduce Atticus and his parents to her family. Molesley is concerned about Daisy.
When the team finally unearth the shocking truth about Imogen's murder, it exposes a web of lies and deceit which puts those connected to the case in imminent danger from the sinister Alan Lane.