Wow. Attention National Geographic: This is how it's done. My only gripe is waiting 4 years for the next 16.

Agreed. An amazing series.

........But when are the next ones going to air - were those first 4 the "first season?" .....And by 4 years for the 16 - that pretty much means 4 years for another new one to even come on air?

I loved the series. Was hoping they would show all of them. It would have been a great season for all the countries to be shown.

Wait....I saw one on Japan.....did they make new ones and not update this forum or what????