The season finale of Who Do You Think You Are? follows actress Liv Tyler. This episode will NOT air of Sunday evening as the rest of the series, but will air Monday, April 24 at 8 / 7 Central. It looks like Liz is joined by her father, Steven Tyler of Aerosmith for part of her journey into the his family.
According to TLC:
Liv unravels the mystery of her father Steven Tyler's maternal family line, uncovering ancestors who took part in famous American battles. She also learns shocking truths that change the way she will see herself and her family, forever.