Guest Stars Dave Hill as Fenner Lydia Leonard as Marion Greenwood Deborah Findlay as Mrs Thorndyke Samuel West as Lt Col James Wintringham Tony Haygarth as Leo Maccoby Murray McArthur as Guard at Hill House Ronald Pickup as Sir Giles Messinger Rupert Frazer as Commander Charles Howard Timothy Carlton as Admiral James Francis John Grillo as Pilkington Timothy Kightley as Cooper Goran Kostic as Jan Komoroski William Scott-Masson as Dumont Amanda Pointer as Admiralty Receptionist Angela Thorne as Lady Anne Messinger Markus Napier as German SD Officer Paul Brennen as Eric Stafford Raymond Coulthard as Nicholson