1943. On the Eastern Front the Germans are losing the battle; to the west, they are assailed by the Allied Powers. But in a snow-clad valley in the Hartz mountains of central Germany, a British agent observes the visit of a senior Nazi to a top secret location. That Nazi is Hermann Goering and the Reichsmarschall does not have surrender on his mind. James Jackson comments: 'It was a moving and salutary experience to visit the tunnels of Nordhausen in which the Nazis built their V2 rockets. Given this facility was controlled by the SS while Goering was in charge of Germany's nuclear programme, the plot-lines started to form. Sixty thousand slave labourers worked on those tunnels and only half emerged alive. It is history worth remembering.'