I just watched this in the last couple of weeks and I too found it fascinating. And a bit voyeuristic as David learns some details of his family history that he wasn't quite expecting.

It has actually motivated me to do some digging into my family tree, as I can really only talk about my own grandparents (on my mom's side) before things get murky. Also I believe I am Scottish (as well as Bohemian) and I'd like to find out more about that.