Hitler's strategic missteps take center stage in this episode covering two turning points of the Second World War. At Dunkirk in 1940, with the British Army trapped and London within reach, Hitler halts the German advance, a delay that allows Britain to evacuate and rebuild its forces before the Allied landings later in the war. The film then follows the Battle of Britain, where Hitler shifts Luftwaffe bombing away from military targets and infrastructure toward London and other cities, inadvertently giving British war industry time to accelerate weapons and aircraft production. The narrative extends into Operation Barbarossa, the invasion of the Soviet Union, tracing how these compounding decisions cost Germany its early advantage. Archival footage, maps, and expert narration reconstruct the military logic and the miscalculations behind it, framing 1940-41 as the period when the war's momentum quietly turned against Hitler. The episode is part of a series examining the campaigns and choices that shaped Nazi Germany's defeat.