Mark your calendars! Friday, February 3, Who Do You Think You Are? returns for a third season. The NBC series focuses on the family history of celebrities. This season’s celebrities are: Martin Sheen, Marisa Tomei, Blair Underwood, Reba McEntire, Rob Lowe, Helen Hunt, Rita Wilson, Edie Falco, Rashida Jones, Jerome Bettis, Jason Sudeikis and Paul Deen.