Who Do You Think You Are? (2004) : 12x10

Frances de la Tour's family tree holds a tantalising clue which hints at aristocratic ancestors. Hot on the trail of her three times great grandmother Frances uncovers a story of a secret lover, an illegitimate child and a landmark divorce case. But the scandal doesn't stop there. Tracing back another generation Frances uncovers the tragic story of Sophia Delaval - and traces her roots back to Seaton Delaval, the historic family residence.