Actor Bill Paxton is featured this Sunday (April 19 at 10/9c on TLC) on Who Do You Think You Are? and digs into the paternal half of his family tree. He begins by solving a long-standing mystery by determining that he is indeed related to Texan hero Sam Houston -- a particularly timely discovery since he just happens to be portraying him in a movie coming out next year.
Then he moves on to an intriguing 4th great-grandfather who served as a spy during the Revolutionary War. What more can he learn about this ancestor? Watch this sneak peek to find out: