As New York spilled into the new century, the extraordinary interplay of capitalism, democracy and transformation surged to a climax. During a single generation, over 10 million immigrants arrived in New York. The city itself became an even more dramatic lure with the construction of the first subways and skyscrapers. And arising from the plight of New York's most exploited citizens came landmark legislation that would eventually transform the lives of all Americans.

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.

In exploring the social, economic and physical forces that swept through the city in the post-war period, Episode Seven examines the great African-American migration and Puerto Rican immigration of the '40s, '50s, and '60s; the beginnings of white flight and suburbanization; and the massive physical changes wrought by highways and urban renewal -- all of which were directed, to a surprising degree, by one man: Robert Moses. The film comes to a climax with the destruction of Penn Station, the battle over the Lower Manhattan Expressway, the social and fiscal crises of the '60s and '70s, and New York's miraculous revival in the last quarter-century.