In little more than ten years, immense new forces were unleashed in New York, from the Depression itself to the New Deal, which permanently altered the city and the country. Along the way, two of the most remarkable New Yorkers of all time came to the fore: Mayor Fiorello La Guardia and master builder Robert Moses, both of whom attempted to create, in the darkest of times, a bold new city of the future. The episode examines their careers in detail, as well as the immense public works that transformed the city in the '30s. Also explored are the demise of Mayor Jimmy Walker, the coming of the New Deal, the fate of Harlem during the Depression, and the increasingly complex impact of the automobile on the city.