Dan O'Neill is on a mission to save the snow leopard. In Kyrgyzstan, there's a snow leopard that has never encountered humans. And in Mongolia, he tracks down the largest snow leopard ever recorded.

Irma, a category five hurricane, devastates the Caribbean. In Fiji, a carer battles catastrophic floods to reach children at an orphanage.

Europe's Danube is ranked as one of the world's most endangered rivers. Jeremy goes in search of two beasts: a fish so valuable that criminals are hunting it out of existence and a man-sized predator.

Two US Army veterans help Gary with a rescue at the park, and Arlie and Blue wrangle a feisty gator out of a dangerous situation.

Thanks to Hosana's exceptional hunting skills, Tingana rebuilds his strength, finally challenges Hukumuri for the dukedom, defeats him and keeps his cubs safe.

Wild and un-navigable, Africa's iconic Zambezi boasts the world's mightiest waterfall, heart-pounding rapids, and man-eating crocs. Jeremy investigates why this great river is in trouble.

An unusually low snowfall and a late freeze-up in the Arctic presents new challenges to the Alaskans. Travel on the treacherous trails through the wilderness becomes more of a risk.

Forty years after the Chernobyl disaster, an updated version of the acclaimed documentary 'Radioactive Wolves' returns to a place that once stood as a symbol of horror.

The rains bring relief to many, but the lion prides struggle to hunt in the lush habitat: they lack camouflage. Einstein forms a coalition, but he soon learns that friendship is fickle.

An unusually low snowfall and a late freeze-up in the Arctic presents new challenges to the Alaskans. Travel on the treacherous trails through the wilderness becomes more of a risk.

Heatwave Lucifer burns though Europe, triggering some of the worst wildfires in Portugal's history, while a Mojave mudslide traps motorists in a raging torrent of sludge.

Wild and un-navigable, Africa's iconic Zambezi boasts the world's mightiest waterfall, heart-pounding rapids, and man-eating crocs. Jeremy investigates why this great river is in trouble.

An unusually low snowfall and a late freeze-up in the Arctic presents new challenges to the Alaskans. Travel on the treacherous trails through the wilderness becomes more of a risk.

Forty years after the Chernobyl disaster, an updated version of the acclaimed documentary 'Radioactive Wolves' returns to a place that once stood as a symbol of horror.

Thanks to Hosana's exceptional hunting skills, Tingana rebuilds his strength, finally challenges Hukumuri for the dukedom, defeats him and keeps his cubs safe.

The Yangtze, the biggest river in Asia, was once home to rare aquatic mammals and prodigious quantities of fish. Jeremy passes by Shanghai, the huge Three Gorges Dam, and the uplands of Yunnan.

With winter losing its grip, Alaskans take on new projects and develop new skills for their survival. They travel to build shelter, gather important firewood, and harvest new food sources.

Tropical diseases such as dengue fever, malaria, chikungunya and West Nile virus were long considered a distant problem. But now they have arrived in Europe. How great is the danger on our doorstep?

The rains bring relief to many, but the lion prides struggle to hunt in the lush habitat: they lack camouflage. Einstein forms a coalition, but he soon learns that friendship is fickle.

With winter losing its grip, Alaskans take on new projects and develop new skills for their survival. They travel to build shelter, gather important firewood, and harvest new food sources.

Heatwave Lucifer burns though Europe, triggering some of the worst wildfires in Portugal's history, while a Mojave mudslide traps motorists in a raging torrent of sludge.

The Yangtze, the biggest river in Asia, was once home to rare aquatic mammals and prodigious quantities of fish. Jeremy passes by Shanghai, the huge Three Gorges Dam, and the uplands of Yunnan.

Forty years after the Chernobyl disaster, an updated version of the acclaimed documentary 'Radioactive Wolves' returns to a place that once stood as a symbol of horror.