This BBC/Discovery Channel co-production was filmed in dozens of locations around the world over a two-year period and documents how humans interact with their natural surroundings. The six-part programme travels to extreme locations to show people who survive in those locations by building complex relationships with their animal neighbours and nature's hostile elements. Each episode is tied to a particular habitat, including the Arctic rivers and oceans, mountains, grasslands and jungles, and deserts. Mike Rowe, the voice of `Deadliest Catch' and presenter of `Dirty Jobs', narrates.