Guest Stars Jennifer Hennessy as Ruth Shaw Peter O'Byrne as Town Hall Official Georg Nikoloff as Russian Agent Kate Duchêne as Helen Fraser Bush Moukarzel as Soldier at Vlessing's Joe Duttine as Frank Shaw Stephen Swift as Radiation Soldier Sam Clemmett as Jack Shaw Emma Lowe as Jane Conway Cyril Conway as Philip Judge Anne Kent as Woman on Stairs Marc Vlessing as Nathan Gordon Patrick Joseph Byrnes as American Scientist Dylan Charles as Aleksei Gorin Gyuri Sarossy as Tomasz Debski Christopher Fulford as Det. Supt. Cranborne Gabrielle Lloyd as Maureen Greenwood Steve Wilson as Duty Police Officer