Some just counted tanks, others stole blueprints for bombs. The Cold War was the battleground for thousands of spies and spotters. Even the Allied Military Missions in Germany doubled as covert observers in the spying game.
Examines the botched raid on the German-occupied harbour of Dieppe, France in August 1942, which resulted in the loss of around 4,000 Allied men and drove home just how costly an invasion of France would be. The programme also focuses on Hitler's order in 1945 to destroy any military or industrial facilities that could be useful to the enemy - which would have condemned the German people to utter desolation.
The dramatic story of the D-Day landings and of the liberation of Paris. In the east the Soviets liberate Auschwitz and fight their way to the heart of Berlin. Germany finally surrenders, but Japan fights on until the atom bombs are dropped.
A look at the Battle of Britain, examining the limited resources the British military were left with following the retreat from Dunkirk, and the pressure on German forces to conquer England quickly, so attention could be switched to Russia. The second half of the programmes examines the US entry into the war, in defiance of the promise made by President Roosevelt during his re-election campaign.