The Laughlin's final step back into their family history begins in 1718, and presenter Gavin Andrews reveal a direct link to a famous ancestor known in America as the Moses of the Ulster-Scots. Three hundred years ago their ancestor led an Ulster-Scots community to America. It was one of the earliest and most celebrated mass emigrations in modern times and the Laughlins are completely unaware of the central role played by one of their family. Gavin takes grandfather Alan and his son Ainsley on an American road trip to find out what life was like for the early Ulster-Scots settlers, before visiting the community that their ancestor founded. While they do that, the rest of the family look into the early life of their ancestor. The programme culminates in a surprise party where the Laughlins get to meet an American branch of the family.