Trailer: Series 23

Lost connections and histories are revealed as celebrities trace their family trees

20 May 2026

31 seconds

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Who Do You Think You Are?

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"Bahamian men played a significant role in the foundation of... Miami today"—Series 23, Katarina Johnson-Thompson
Duration: 01:13
Katarina's quest to learn about her dad's side of the family—Series 23, Katarina Johnson-Thompson
Duration: 00:31
How Katarina Johnson-Thompson's parents met—Series 23, Katarina Johnson-Thompson
Duration: 01:06
"We don't know what he looked like because he burned his portrait"—Series 23, Dame Harriet Walter
Duration: 01:34