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It's grouse-shooting season, and Rose's father-in-law, Lord Sinderby, has rented out Brancaster Castle in Northumberland and invited the Crawley family to a shooting party. Stowell, the Sinderbys' butler, has an ax to grind and a scandalous secret threatens to undermine the holiday. Surprises are in store as the families become better acquainted with each other and some new faces arrive on the scene. Meanwhile, the servants hold the fort back at Downton.
- Writers: Julian Fellowes
- Stars: Allen Leech , Brendan Coyle , Dan Stevens , David Robb , Elizabeth McGovern , Hugh Bonneville , Jim Carter , Joanne Froggatt , Kevin Doyle , Laura Carmichael , Lesley Nicol , Lily James , Maggie Smith , Michelle Dockery , Penelope Wilton , Phyllis Logan , Raquel Cassidy , Rob James-Collier , Siobhan Finneran , Sophie McShera