S1, E2: The Supermarine Spitfire is one of the greatest air-to-air fighters in history, entering into combat over the skies of Dunkirk, London, and Malta when Britain needed it most. But before earning its reputation as the defense of the free world, the Spitfire experienced its share of turbulence against the mighty Luftwaffe. Thanks to a radical idea for an elliptical-shaped wing, a Rolls Royce engine, and ace pilots, this is the story of how it ultimately prevailed and helped free the world of tyranny.