I found this interesting, although I'm afraid, I did not know anything of the man himself or his work. Agreed, it started with known things, and fairly close in time span, and covered things that he might quite well have guessed. Agreed, he'd been to some places previously, and already knew some people who were providing the information, but it had a good flow to it, and it worked.
Already I can't wait for the next series. This series has regained its form, after a couple of weak series. I hope that it continues to be made.