Sean explores his paternal ancestry focusing on his Hayes line, and that leads him via Chicago and Dublin back to Ballylongford in County Kerry. What will he learn there? Check out this exclusive video provided by TLC to get a taste:
This Sunday on Who Do You Think You Are? (March 22, 2015 at 10/9c on TLC), Angie Harmon -- who always thought she was Greek, Irish and Native American -- makes some surprising discoveries about the Harmon branch of her family tree.