Everyone is in London for the wedding, but family tensions on both sides threaten to derail proceedings. Denker reveals an unexpected side to her personality, which causes trouble for the servants. As the war memorial due to be unveiled, Mrs. Patmore is still upset but luckily Robert has something up his sleeve.
Rosamund returns to Downton following Edith's surprise departure. Now that Anna Bates' problems are behind her, they think about taking a fresh start. Molesley is concerned after Daisy is becoming disillusioned with her studies and feels let down by the Labor government.