"Downton Abbey" resumes the story of aristocrats and servants in the tumultuous World War I era. The miniseries is written by Julian Fellowes and stars Dame Maggie Smith, Elizabeth McGovern, Hugh Bonneville and a drawing room full of new actors, portraying the loves, feuds and sacrifices of a glittering culture thrown into crisis. Downton is turned into a convalescent home with Thomas in charge. Meanwhile, Lavinia and Sir Richard's secret comes out, Anna tracks down Bates and Branson seizes his chance to strike a blow for Ireland.