Host Scott Fisher opens the show with David Allen Lambert, Chief Genealogist of the New England Historic Genealogical Society and AmericanAncestors.org. The guys begin with the story of a Canadian man who learned from a newspaper birth listing from the early 1950s, and DNA, that he had been switched at birth. Then, one of the oddest stories of the year… a married couple is freaking out because they learned that they share ancestors eight generations back! Then, a cannon ball has shown up at a beach in Rhode Island. You won't believe where the finder is keeping it. At Colonial Williamsburgh, a dig has revealed a remarkable new find at a spot that David has walked over countless times. And finally, Europe's oldest publication has been dated at over 2,300 years old.

Next, in two parts, Fisher visits with Dr. Nick Barratt, best known in the UK for his hosting and research on four seasons of "Who Do You Think You Are?" In his own research, Nick has discovered that his paternal grandmother's brother was a spy for the Soviet Union leading up to World War II! Hear how he discovered this shocker, how it has impacted him and his immediate family, and how it has changed his understanding of how he presents information he provides to others.

Then, David returns for another couple of rounds of Ask Us Anything.

That's all this week on Extreme Genes, America's Family History Show!