In South Africa, Carrie longs to be reunited with the father she has never met.

Chilean-born, US-based Ariel is on a mission to meet his long-lost sister in Italy with the help of social media, and in the UK will a DNA test hold the key Sarah's parentage?

Sisters Emily and Lynn only met four years ago in Sweden. Now they want to meet their biological brother. Kelsey was raised by her grandmother and wants to meet her lost siblings.

Emilie and Lin are reeling after their Facebook appeal to find their brother, impacting on their mum in Indonesia. In the US, Marnita struggles to discover she was a stolen baby.

21-year old Lena was adopted as a baby from Russia by an American couple. Can she afford to meet her birth family? Meanwhile, Sander uses social media to find his Indonesian family.

A man from the Netherlands receives devastating DNA results, and a widow raising four children alone in California fears her birth parents do not care about her or her children.