The heir crisis at Downton Abbey takes an unexpected turn. Anna unearths Bates’ mysterious past and O’Brien and Thomas plot their exit strategy.

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.