Actor and film-maker Noel Clarke grew up in west London with his single-parent mum, and this left one side of his family tree a mystery to him. His search starts in Trinidad, where both his parents are from, but soon takes him on a trail to other islands, ending on one of the smallest and most beautiful in the Caribbean. There he learns of an extraordinary great-great-great-great-grandfather called Glasgow Bedeau, who was born into slavery. The music Glasgow's enslaved parents and grandparents passed down reveals the part of Africa from which Noel's ancestors were taken.

Ruby Wax journeys to central Europe to learn about the plight of her parents, who fled Vienna and the Nazis for America in 1938.