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.