How "Downton Abbey" re-creates the etiquette of Edwardian-era England, featuring its historical adviser, Alastair Bruce; and Hugh Bonneville, Michelle Dockery, Laura Carmichael, Elizabeth McGovern, Brendan Coyle, Joanne Froggatt and Lily James. Included: scenes from throughout the series are used to show the proper way to eat, marry, behave, dress, and make money.