Charlotte looks for her dad after losing her mother. Rogie tries to find a secret sibling. And Lviss investigates whether his ancestry really is Nigerian.
Adopted Laura is searching for any siblings, Anthony, Sally and Karen want to uncover the truth about their father's other child, and Julie is looking for answers about her ancestry.
Judy looks for her missing father, who was deported after World War II, presumed dead. John questions his ancestry, and Ukrainian sisters Svitlana and Oksana look for family in Britain.
Steph is a foundling looking for her biological family, while Mark wants to know if he really is Egyptian. Viv is searching for the sister who was taken from her mother in Ireland.
Stacey Dooley is meeting people across the UK who want to unlock mysteries hidden within their genetic code. Working with one of the UK’s leading geneticists, as well as genealogists, social workers and doctors, she uses the very latest DNA technology to reveal lost heritage, track down missing relatives and detect debilitating diseases before it is too late.