An old leopard queen is dead; when Thandi, the new queen, discovers the young cubs left behind, the fight for survival and for the crown of Djuma is on.

The worst earthquake in almost a century strikes Ecuador. Meanwhile, Indiana suffers one of its worst ever tragedies as a storm blows down the main stage during a festival.

The iconic Ganges, the world's most revered river, is in trouble. Travelling to India, Jeremy's investigation takes him from crab-hunters in the delta to the mountains in search of a rare predator.

The team take a paddle boat out for a rescue, a hunt for a sneaky gator ends in chest-deep water, and a gator with an eye problem gets a check-up.

The duke is desperately ill, and a new male wants to claim his territory while trying to kill young Hosana and baby Tlalamba in the process.

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.

In the Arctic, the search for water, firewood, and other vital resources is a never-ending quest. It requires Alaskans to explore remote locations unfit for normal human existence.

This episode highlights the Belitsa Bear Reserve, the legends of the Rila Lakes and the ruins of an abandoned village on the Turkish-Bulgarian border where nature has been able to reclaim.

The Waterfront Pride continues to harass drought-weakened elephants that traverse their territory. Kalwezi's cubs are enjoying a happy introduction to the family. Einstein is now a nomad.

In the Arctic, the search for water, firewood, and other vital resources is a never-ending quest. It requires Alaskans to explore remote locations unfit for normal human existence.

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

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.

In the Arctic, the search for water, firewood, and other vital resources is a never-ending quest. It requires Alaskans to explore remote locations unfit for normal human existence.

This episode highlights the Belitsa Bear Reserve, the legends of the Rila Lakes and the ruins of an abandoned village on the Turkish-Bulgarian border where nature has been able to reclaim.

The duke is desperately ill, and a new male wants to claim his territory while trying to kill young Hosana and baby Tlalamba in the process.

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.

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 Waterfront Pride continues to harass drought-weakened elephants that traverse their territory. Kalwezi's cubs are enjoying a happy introduction to the family. Einstein is now a nomad.

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.

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.

This episode highlights the Belitsa Bear Reserve, the legends of the Rila Lakes and the ruins of an abandoned village on the Turkish-Bulgarian border where nature has been able to reclaim.