- 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
Mary receives a letter from Matthew's effects, naming her as his sole heir and therefore the owner of half the estate. Encouraged by Violet, she agrees to shadow Tom and learn more about the running of Downton and its surrounding properties. Edna makes an inauspicious start as Cora's maid but soon forms an alliance with Thomas to discredit Anna. Anna herself accompanies Rose to a tea-dance in York for servants, where Rose, pretending to be a maid, attracts gardener Sam Thawley but also provokes a fight so that a hurried exit is required as the police arrive. Later, Sam turns up at Downton Abbey. Isobel learns that Carson fell out with Charlie Grigg many years earlier over a love triangle.