Episode Two explores the many journeys to becoming American that defined the "Century of Immigration" (1820s ? 1924) and transformed the United States from a sleepy agrarian country into a booming industrial power. Stephen Colbert's Irish great-great-grandfather escaped poverty and religious oppression in Limerick and never looked back, whereas Mario Batali's great-grandfather, who left the place where his family had lived for centuries, struggled to survive in the quartz mines of Montana. Her Majesty Queen Noor's Syrian great-grandfather quickly found his footing in New York's first Arab American community, while Kristi Yamaguchi's grandfather faced exclusionary laws and racially-defined barriers to citizenship for decades. The obstacles, short-cuts, tragedies and successes encountered or created by the guests' ancestors from around the world reveal the complexity of our shared history and identity as Americans.