Join Dr. Henry Lewis Gates, Jr., starting tonight (9/23 at 8pm), for a genealogical exploration, during the emotional season premiere of the hit PBS series "Finding Your Roots," which will feature Courtney B. Vance, Gloria Reuben and Stephen King, as they search for clues about their biological parents. 

Every Tuesday from here-on, a new group of guests will discover their diverse histories, including actresses Angela Bassett and Khandi Alexander, actor Ben Affleck, journalist Anderson Cooper, tennis great Billie Jean King, and rapper Nas to name a few.

Visit Thirteen.org to get a sneak-peak of upcoming episodes and to stream last season. Plus, enter to win a copy of the book "Finding Your Roots: The Official Companion to the PBS Series."

Watch a preview of the entire season below: