Davina McCall and Nicky Campbell revisit more of the programme's most memorable searches, catching up with two people whose lives have been transformed. Kathleen Fraser Jackson was reunited with her birth mother in Canada, and the programme follows her to Jamaica to meet her youngest sister Peta Gay for the first time. The second story has never been shown before and features twins who were separated as babies.

In our second episode we follow reunited siblings, Geoffrey Tonks and Barbara Jacobs as they investigate a family mystery and try to trace a missing sister.

Davina McCall and Nicky Campbell follow three stories of sons coming to terms with the past, including Marc Wolfe's struggle to form a bond with his birth mother Esther, who lives in New Zealand. However, his search for identity didn't end there as researchers were able to reunite him with his birth father David, and the pair have grown close. One significant hurdle remained in the form of introducing David to his adoptive father Terry, and cameras were there as Marc introduces his two dads to each other.