Combining technical climbing with a passion for conservation, arborist Will Koomjian goes higher and farther than most would ever dare. His love for nature has taken him around the world and to the tops of the most ancient trees on the planet.

Deep in the heart of the African bush, every day is a dangerous game of cat and mouse. Outnumbered and outgunned by organised crime, Tumi Morema and his team of rangers stand firm against poachers for the sake of Africa’s endangered wildlife.

In the turbulent waters off Alaska’s remote coastline, Jeremy Leighton and his crew leave their boats behind and walk the ocean floor, harvesting sea creatures that provide an unlikely bounty. This is the underwater world of Alaska’s dive fishermen.

Off the southern tip of Africa, Ryan Johnson and his team strive to protect nature’s perfect predator: the great white shark. While their research is shedding light on one of Earth’s most misunderstood creatures, each venture at sea is full of risk.

In order to provide the timeliest storm updates for at-risk citizens of America's Midwest, Ben McMillan and his storm chasing team roam the frontiers of Tornado Alley, getting as close to these violent weather systems as possible.