Guest Stars David Morrissey as John Arbuthnot Jessica Chastain as Mary Debenham Barbara Hershey as Caroline Hubbard Samuel West as Dr. Constantine Hugh Bonneville as Edward Masterman Brian J. Smith as Hector MacQueen Toby Jones as Samuel Ratchett Eileen Atkins as Princess Dragomiroff 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
