Una Stubbs never got the chance to meet her paternal grandparents and learns that they didn't die until she was in her 20s. She manages to uncover a story of illegitimacy and poverty.
Nigel Havers takes a look at his mother's line and travels to Cornwall to learn about a tale of illegitimacy worthy of a period drama. On his father's side, he ends up in Colchester where he learns a tale of the Victorian equivalent of an Essex taxi driver made good, who ends up losing everything though.
Minnie Driver wants to learn more about her late father, Ronnie, and his family's history. Her parents were not married, and she only found out when she was older that her father had a wife and another family all the time her parents were together.
Lesley Sharp delves into her family's past this week. She was adopted at five weeks old, having been born as a result of her birth mother's affair with a married man.
Gary Lineker delves into his family's past this week. He follows the trail of his great, great great grandfather James Pratt, and finds out that he was a poacher in Victorian England and served time inside Leicester Prison.
Nick Hewer delves into his family's past this week. He discovers how his mother's Catholic father Oswald Jamieson managed to reach the prestigious office of High Sheriff in Protestant-dominated 1920s Belfast.
Nitin Ganatra delves into his family's past this week. Nitin moved to the United kingdom from Kenya when he was just three years old. He attempts to find out why his family left Kenya, and why they immigrated to Africa from India in the first place.
Sarah Millican finds out that her three times great grandfather was one of the first ever divers in the world. She also follows the trail of her four times great grandfather, John Malcolm, to Canada where he worked for the Hudson's Bay Company.
Marianne Faithfull always had a strained relationship with her mother, Eva ans she takes a look at Eva's earlier life, as a dancer in 1920s Berlin. She also finds out about her half-Jewish mother's life in Vienna during World War Two.
John Simpson delves into his family's past this week. He always believed that his great-grandfather was Samuel F Cody, the Wild West entertainer. It was only later that he found out that his great-grandmother had run off with Cody, taking her children with her. He also takes a look at what happened to the husband she left behind.