Bremner didn't know his father very well as he passed away when Rory was age 18. Bremner discovered that his father fought in the second world war and was instrumental in both the war and post war.

Fiona Bruce's great-grandfather, Frederick Crouch, died during World War One in mysterious circumstances. The family story is that Frederick failed to duck down when shells began falling nearby.

Rick Stein's father Eric suffered from manic depression and committed suicide in the 1960s. Rick explores his father's life. Next, travels to China to explore the life of his great-grandfather Henry Parkes, a 19th-century missionary.

Zoe Wanamaker was born in New York, but when she was three her father, American actor Sam Wanamaker, fled to the UK to escape the anti-communist McCarthy witch-hunts.

Kevin Whately, famous for playing working-class characters, has a surprisingly affluent family history.

Davina McCall makes some intriguing and shocking discoveries as she delves into her family's past. As a child of divorced parents, Davina, who is half-French, was brought up by her paternal grandmother in England.

Radio 1 DJ Chris Moyles finds himself unexpectedly emotional as he goes back to his Irish roots.

Kate Humble knows little about her family history. What she does know is that her paternal grandfather was a test pilot, and she believes her maternal grandfather ended up in Colditz.

Liverpool-born Kim Cattrall is determined to solve a family mystery that has endured for more than 70 years. When Kim's mother, Shane, was eight years old, her father disappeared.

Martin Freeman's father died when he was just 10 years old. His parents had divorced some years before and Martin knows virtually nothing about the paternal side of his family history. Now he wants to fill in the blanks.