Who do you think you are? That's the question that Lisa Kudrow has been helping celebrities answer with her show of the same name on tracing genealogy. Kudrow stopped by "Today" to talk about the show's third season and the amazing discoveries that Martin Sheen made during his family tree search. "I'm very proud of this show," Kudrow told the "Today" co-hosts. Watch the above video to see what Kudrow is so proud of.