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2008 • 6 Episodes
Season 1 of Who Do You Think You Are? premiered on January 13, 2008
2009 • 6 Episodes
Season 2 of Who Do You Think You Are? premiered on September 27, 2009
2010 • 6 Episodes
Season 3 of Who Do You Think You Are? premiered on November 28, 2010
2012 • 6 Episodes
Season 4 of Who Do You Think You Are? premiered on March 27, 2012
2013 • 8 Episodes
Season 5 of Who Do You Think You Are? premiered on April 2, 2013
2014 • 8 Episodes
Season 6 of Who Do You Think You Are? premiered on July 8, 2014
2015 • 9 Episodes
Season 7 of Who Do You Think You Are? premiered on August 4, 2015
2016 • 8 Episodes
Season 8 of Who Do You Think You Are? premiered on September 13, 2016
2018 • 8 Episodes
Season 9 of Who Do You Think You Are? premiered on April 17, 2018
2019 • 8 Episodes
Season 10 of Who Do You Think You Are? premiered on April 30, 2019
2020 • 8 Episodes
Season 11 of Who Do You Think You Are? premiered on May 19, 2020
2021 • 8 Episodes
Season 12 of Who Do You Think You Are? premiered on June 8, 2021
2022 • 8 Episodes
Season 13 of Who Do You Think You Are? premiered on June 21, 2022
2023 • 8 Episodes
Season 14 of Who Do You Think You Are? premiered on May 2, 2023
2024 • 8 Episodes
Season 15 of Who Do You Think You Are? premiered on May 7, 2024
2025 • 8 Episodes
Season 16 of Who Do You Think You Are? premiered on May 13, 2025