Its available on ABC iview atm, not as good quality but free and doesnt count in your monthly download limit, available as a download too, not sure about the quality of that.
It was good and worth watching, but I cant help think they could do better, and refering to them as lizard king's everytime instead of monitors or by species got old real quick for me.
Maybe they just need to do another one to get it right I'd love to see more!