1855: When Doctor Thorne’s penniless niece, Mary, is excluded from the wedding preparations of her childhood playmate, she probes her uncle for the truth of her birth.
Guest Stars:
Cressida Bonas
Sir Roger becomes seriously ill, and Dr Thorne believes that he will die soon. The railway entrepreneur's son pays him a visit, and to the docotr's horror, takes a liking to Mary. Miss Dunstable urges Frank to follow what his heart tells him.