Lady Mary's past catches up with her when an unwelcome visitor delivers an ultimatum, and news about the running of Downton Hospital puts Violet on the warpath.

Cast: Rick Bacon, Zac Barker, Samantha Bond, Hugh Bonneville, Nichola Burley, Laura Carmichael, Jim Carter, Raquel Cassidy, Paul Copley, Brendan Coyle, Michelle Dockery, Kevin Doyle, Michael Fox, Joanne Froggatt, Rob James-Collier