Guest Stars Jessica Chastain as Mary Debenham Samuel West as Dr. Constantine Barbara Hershey as Caroline Hubbard Eileen Atkins as Princess Dragomiroff Brian J. Smith as Hector MacQueen Hugh Bonneville as Edward Masterman Toby Jones as Samuel Ratchett David Morrissey as John Arbuthnot Marie-Josée Croze as Greta Ohlsson Denis Ménochet as Pierre Michel Sam Crane as Lt. Blanchflower Serge Hazanavicius as Xavier Bouc Tristan Shepherd as Lt. Morris Susanne Lothar as Hildegarde Schmidt
