Emmy-winning docuseries Who Do You Think You Are? is returning to NBC for a second go-round. The network has ordered 13 episodes of the docuseries from executive producers Lisa Kudrow and Dan Bucatinsky. Ancestry and Shed Media are producing.
NBC has renewed three unscripted programs for the 2011-12 season, including the popular weight-loss competition series The Biggest Loser. Who Do You Think You Are?, from Lisa Kudrow, and the singing competition series The Sing-Off are also returning.