This, yeah?

http://dsc.discovery.com/convergence...ide/guide.html

If so, then it's the same one I'm on about. It's an amazing series. I got the DVDs of both series for Christmas (as well as having watched them on TV) and I have to say, on a HDTV it looks stunning.

I don't know how far into the whole thing you are, but have you seen the episode on Caves? That one has to be my favourite.

EDIT: Looks like they've changed the narrator for you folks. We had David Attenborough. I wonder if the episodes are the same, or different.