Who Do You Think You Are? premiered on NBC on March 5, 2010. This series is a unique and personal glimpse into the lives of our favorite celebrities. In each episode of Who Do You Think You Are?, a celebrity embarks on a journey of self-discovery and unearths his or her family tree - revealing surprising, inspiring and sometimes tragic stories that are often linked to events in American history. We share intimate moments with the stars as they learn about their past, and how the struggles of their ancestors have shaped today's world.