- 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 and Matthew return from their honeymoon but he is still reluctant to take the Swire inheritance so the family plans to impress Martha with a lavish dinner party, entertaining locals, in the hope that she will bankroll them. When the oven breaks down, Martha saves the day with her indoor picnic but is unable to provide the financial help the family wants. A jealous Thomas sets out to sabotage Alfred and replace him with Molesley but O'Brien gets revenge by humiliating Thomas whilst Isobel, working at a charity in York to help single mothers, spots Ethel, who runs off after being recognized. Mrs Patmore accompanies a nervous Mrs Hughes to the doctor after the housekeeper finds a lump on her chest. He takes tests but the analysis will take two months and the women agree to keep it secret from other staff. Despite her father's early disapproval that he is too old for her, Edith finally gets engaged to Sir Anthony.