Free on Comcast OnDemand, even if you don't have National Geographic. Show is pretty good, and a done well by NatGeo. A nice antidote to the crap on TLC and some of the other channels.
National Geographic - Inspiring People to Care About the Planet Since 1888 Also has a lot of info,clips,etc.
Free on Charter On Demand as well; great eye candy in HD. Good show, though their accents are laced with a little bit of, I dunno, softness? Is that an accurate description? I guess it's the exact opposite of what I hear around these parts.
