When Chummy’s imperious mother visits and disapproves of Peter Noakes, Chummy defies her mother and has her wedding on her own terms. Senile Sister Monica Joan is arrested for shoplifting.

After Downton is turned into a convalescent home for wounded officers, Matthew brings a general to visit, but Branson has a surprise in store. And is Lavinia hiding something?

The Doctor takes Martha to New Earth, in the far future, only to find that an entire city has become a deadly trap.