Created by Oscar-winning writer Julian Fellowes (Gosford Park), "Downton Abbey" depicts the lives of the noble Crawley family and the staff who serve them, set at their Edwardian country house in 1912. Featuring an all-star cast, including Hugh Bonneville (MASTERPIECE CLASSIC "Miss Austen Regrets"), Dame Maggie Smith (Harry Potter) and Elizabeth McGovern. Laura Linney hosts. The heir crisis at Downton Abbey takes an unexpected turn. Meanwhile, rumors fly about Mary's virtue. Her sister Sybil takes a risk in her secret political life. Anna unearths Bates' mysterious past and O'Brien and Thomas plot their exit strategy. Starring Hugh Bonneville, Dame Maggie Smith and Elizabeth McGovern.