Who Do You Think You Are? - Season 3

Actor Martin Sheen traces his family tree, hoping to find his ancestors shared his love of activism; Martin discovers a family secret from the 1700s.

Actress Marisa Tomei travels to Italy to uncover the truth about her great-granddather's death.

Actor Blair Underwood utilizes a DNA test to dig deeper into his family's roots, where he discovers the secret of his family's origin.

Country music star Reba McEntire heads to Raleigh, North Carolina as she explores her mother's ancestry.

Former professional football player Jerome Bettis travels to Kentucky to learn about his mother's side of the family.

As actress Helen Hunt looks into her paternal family history, she uncovers missing information about her ancestors.

Actress Rita Wilson travels to Greece and Bulgaria to learn more about her late father.

Actress Edie Falco's journey to learn more about her mother's side of the family leads her to Milwaukee and England.

Actor Rob Lowe examines his family history.

Actress Rashida Jones learns about her family history on her mother's side.

Actor Jason Sudeikis heads to Chicago to research the life and death of his paternal grandfather and makes a discovery about his great great grandfather in Pennsylvania.

Chef Paula Deen investigates her family history and learns about an event that affected her ancestors during the Civil War.