The final two episodes in this Norwegian drama tonight which recounts the Nazis' efforts to develop the atomic bomb and the Allies' desperate struggle to prevent it from happening. Tonight sees Claus Helberg escape the Germans despite being badly wounded and making his way back to England. Elsewhere, Werner Heisenberg continues his research without heavy water while the factory is rebuilt, although we can't imagine there will be any rebuilding done once the Americans get wind of their plans.