Amy receives a proposal of marriage which throws her into confusion, Arthur is taken on as a partner in Daniel Doyce's engineering works, and the French villain Rigaud arrives in London.
Casts:
Claire Foy, Matthew Macfadyen, Tom Courtenay, Emma Pierson, Alun Armstrong, Judy Parfitt, Maxine Peake, Andy Serkis, Eddie Marsan, Freema Agyeman, Janine Duvitski, James Fleet, Bill Paterson, Sue Johnston, Ruth Jones, Pam Ferris, Jason Watkins, Anton Lesser, Rosie Cavaliero, Ron Cook, Alex Wyndham, Russell Tovey, Amanda Redman, Eve Myles, Jason Thorpe, Zubin Varla, John Alderton, Georgia King, Arthur Darvill, Geoffrey Whitehead, Kingsley Frances-Gray, Sebastian Armesto, Bel Powley