Photo Flash: Martin Sheen, Marisa Tomei to Be Featured on NBC's WHO DO YOU THINK YOU ARE

On the seasaon premiere of NBC's WHO DO YOU THINK YOU ARE, award winning actor Martin Sheen ("The West Wing," "The Amazing Spiderman"), a longtime activist, sets out on a journey to find out if his ancestors shared his greatest passion. His search leads him to Ireland where he investigates his uncle's ties to the Irish Civil War and his devotion to activism. He continues his journey in Spain, where he uncovers another relative who also fought for social justice and was wrongfully imprisoned during Franco's fascist regime. As he continues to trace his Spanish roots back to the 1700s, he unearths an unexpected family secret. The episode airs Friday, February 3rd at 8:00 pm/ET

The following week, Academy award winning actress Marisa Tomei investigates the truth behind a family murder mystery. Tomei grew up hearing that her great-grandfather was murdered for being a womanizer and gambler. In order to uncover the truth, she travels to Italy to sort through the facts and discover what really lead to his death. The episode airs Friday, February 10th at 8:00 pm/ET.  

NBC's acclaimed alternative series follows some of today's most beloved and iconic celebrities as they embark on personal journeys of self-discovery to trace their family trees. From Ireland's freedom fighters to the American Revolutionary War, and from the African nation of Cameroon to Bulgaria, this season will reveal the fabric of humanity through everyone's place in history.

The celebrities featured in the third season are Martin Sheen, Marisa Tomei, Blair Underwood, Helen Hunt, Reba McEntire, Jerome Bettis, Rita Wilson, Edie Falco, Rob Lowe, Rashida Jones, Jason Sudeikis and Paula Deen.

During each episode, one of the celebrities is taken on a surprising and deeply emotional quest into his or her family history, resulting in a compelling reality format. Each week, viewers follow some of America's best-known celebrities into their ancestral pasts, as they uncover stories of heroism and tragedy, love and betrayal, secrets and intrigue that lie at the heart of their family history.