Bill wants to learn what happened to his father, an African-American GI stationed at a Leicestershire airbase. Richard hopes to solve the mystery of his parentage. Charlie asks if she and her son are safe from Huntington's disease.
Janine would like to know the identity or ethnicity of her birth father. Margaret wonders if DNA can reveal what happened to her birth mother. 31-year-old Duri could carry a potentially fatal genetic mutation.
Adopted triplets want to discover their ethnicity. Tink would like to know if she has any half donor siblings. Mitchell and Manuela fear their three-year-old son Leo is going blind and are desperate to find a cure.