Already established as America's premier port, New York City swelled into the nation's greatest industrial metropolis as a massive wave of German and Irish immigration turned the city into one of the world's most complex urban environments, bringing with it a host of new social problems. Episode Two reveals how the city's artists, innovators and leaders, from poet Walt Whitman to Frederick Law Olmsted and Calvert Vaux (the designers of Central Park) grappled with the city's growing conflicts -- which culminated in the catastrophic Civil War Draft Riots of 1863.