Actress Naomie Harris's dramatic discoveries in this edition of the show in which celebrities research their family trees inspires her to anger, sadness and tears of joy. On a journey from Trinidad to Grenada to Jamaica, she learns of her great-great-great-great- grandfather's involvement in the exploitation of so-called liberated Africans shortly after the abolition of slavery, is delighted to discover the identify of her African five-times-great grandmother, and uncovers a family story of tragic poverty in Jamaica's capital of Kingston.

Oscar-winning actress Kate Winslet follows a rumour of Scandinavian ancestry on her late mother Sally's side of the family and is delighted when it turns out to be true and that she has Swedish heritage. However, her joy turns to tears and anger when she uncovers the extreme hardships her ancestors endured, from famine to flogging and imprisonment. Switching to her father's side of the family, Kate finds a drummer boy in the Grenadier Guards and, this time, an unusually positive encounter with prison.