In the final episode, Chris travels across the world, from Iceland to Brazil, to Bangladesh and the Maldives. His aim: to reveal the secrets of the world's watery habitats - fresh and salty.
From Shark Bay up to Port Hedland, the Midwest coast is a huge shoulder of land where much of Australia's secret history and untold future is at play.
Despite being one of the world's most isolated cities, Perth is also one of the wealthiest and fastest growing, acting as a control centre for the booming resource fields in WA's north.
How are glaciers formed? Where are they found? How and why do they move? How do they shape the land, both now and in the past?
Steve Backshall and his crew embark on a river expedition deep into the unexplored jungles of Guyana, and they try to catch a black caiman: the largest predator in these rivers.
Sir David Attenborough shows us the hunting patterns of the powerful grizzly bear, an intelligent and adaptable creature, uniquely equipped to deal with life on the tundra of Alaska.
Supporting the Australian Curriculum
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