Stacey Dooley helps people unlock mysteries hidden in their DNA.
Olympic athlete Sarah wants to find her father. Jean, 91, wants to know if her mum died during WW2, and twins Tanya and Kim want to discover their origins before time runs out
Kerry wants to establish her father's true identity. Twins Madison and Sydney want to find their egg donor, and Anthony, 77, wants to discover who his American GI father is.
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.
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.
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.
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.