The Cold War heats up on the German border.
A British spy helps a Russian scientist to defect from the Soviet Union by taking a perilous journey through the Eastern Bloc.
Kevin McNallyJohnny Donoghue
Bernard HeptonHenry Carter
James FaulknerCharles Mawby
Hans CaninenbergProfessor Guttman
Brigitte KarnerErica GuttmanStephan Meyer-KohlhoffWilli Guttmann
Donald PickeringPermanent Undersecretary
Robert LangDeputy UndersecretaryBert ParnabyAdam PercyClaus-Peter SeifertUlf BeckerHans SchödelHeini SchalkeKatharina AbtJutte Hamburg
Marion KrachtRenateEdward ClaytonCharlie DaviesJudy HoltLizzie Forsyth
