Guest Stars Bernard Cribbins as Wilfred Mott Jacqueline King as Sylvia Noble Clive Standen as Private Harris Ryan Sampson as Luke Rattigan Christian Cooke as Ross Jenkins Dan Starkey as Commander Skorr Christopher Ryan as General Staal Rupert Holliday-Evans as Colonel Mace Wesley Theobald as Private Gray Eleanor Matsuura as Jo Nakashima Elizabeth Rider voices Atmos Voice Rad Kaim as Worker Uncredited Freema Agyeman as Martha Clone Jeanie Gold as Neighbour