Who Do You Think You Are?
Who Do You Think You Are? is a TV show on Yesterday. Lost connections and unfamiliar histories are revealed as celebrities trace their family trees. Discover stories of courage, joy, sacrifice and resilience - everyone has a tale to tell. The program has been available since 2026. A total of 20 episodes have been broadcast, most recently in October 2026.
Last episode
Who Do You Think You Are?
Actor Ruth Jones - Nessa from Gavin and Stacey - uncovers her grandfather's role in the Medical Aid Societies of south Wales, which provided a model for the NHS.
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Comedian Josh Widdicombe embarks on a rollercoaster ride through his extraordinary family history, including a courtier with very personal access to King Charles I.
Series 21
Actor, presenter and deaf rights campaigner Rose Ayling-Ellis goes in search of her family history. She encounters a pub landlady and hunts for a rumoured Italian connection.
Series 18
Comedian and presenter Joe Lycett manages to find humour everywhere, but apart from his Edwardian great-grandad, Joe uncovers a darker family history.
Series 21
Paddy McGuinness uncovers his grandfather’s vital work in World War II, how his other grandfather was involved in the Boer War and the family’s journey from Ireland to Bolton.
Series 22
Will Young learns about his grandfather’s time as a prisoner of war in World War II. Delving further back, Will finds a connection to one of medieval history’s biggest villains and a king.
Series 19
Motherland star Anna Maxwell Martin travels to the small town in Northern Ireland where her father grew up, discovering the dark story of her grandfather's childhood.
Series 18
Singer Pixie Lott has heard that she may have Italian ancestry from Verona, but instead she discovers ancestors battling poverty in London and three generations of military musicians.
Series 20
Andrew Lloyd Webber is astonished to uncover stories from his family’s history that uncannily parallel his own life, including an ancestor with a famous cello-playing brother!
Series 19
Ralf Little heads to Orkney to investigate his grandfather Arthur’s role in one of the most important battles of the Second World War. He also finds an international footballer in the family.
Series 20
Chris and Xand van Tulleken discover more about their Dutch heritage. Their research uncovers stories of ambition and true love but also a connection to a shameful part of history.
Series 21
Jessica Ennis-Hill discovers the truth behind a family mystery and finds out about her Jamaican four-time great-grandfather’s journey from enslavement to land ownership.
Katarina Johnson-Thompson travels to The Bahamas and Miami in search of her ancestry. She discovers tales of resilience and courage during a period of shocking racial segregation.
In a journey from Whitehall to Italy and Australia, Harriet Walter discovers a colourful cast of ancestors, taking her from the debtor’s court to the opera house via Italian nobility.
Adeel Akhtar wants to know how his ancestors came from India to Kenya and makes a surprising discovery that his roots in the country run deeper than he ever imagined.
Ruth Madeley unearths a long-buried family secret about an adoption, and a mystery that requires DNA testing and meticulous genealogical detective work to uncover a lost ancestor.
Toby Jones explores an extraordinary acting dynasty on his mum’s side, and he is determined to discover whether his dad’s stories of a connection to India are fact or fiction.
Joe Swash goes in search of his Italian roots. Along the way, he finds stories of murder, banditry, an inspiring political activist and a family bar in southern Italy.
Strictly dancer Amy Dowden turns amateur sleuth, travelling to west Wales to see if she can discover the truth behind a rumour of murder in her family history.
Zoe Ball follows in her ancestors’ footsteps in a journey that takes her from Scotland to Cornwall as she uncovers stories of resilience and the importance of family over place.