The source of the Vltava River lies in the Bohemian Forest; fed by cold and warm Vltava tributaries, Czechia's longest river flows through Sumava moorland and turns dark yellow like liquid gold.

In the most arid regions of the planet - where relentless heat dominates day and night - animals face one of nature's greatest challenges: survival in extreme temperatures.

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.

Hundreds died when the Sobral Santos sank, many allegedly eaten alive. Jeremy retraces the doomed boat's last voyage as he tries to uncover what was behind the Amazon Apocalypse.

Gary, Shannon, Callie and Damon try to catch a ten-foot alligator in a muddy mess, and there is one big problem near a local golf course when a gator gets stuck near a busy street.

Scientists are uncovering new truths about cats using tech like tracking collars; from cheetahs' agility to Iberian lynx recovery, groundbreaking research and conservation offer hope for wild cats.

Biologist and extreme angler Jeremy Wade has hunted a legendary Amazon giant for over 20 years. Locals call it the lau-lau, a creature so huge that it's said to swallow men whole.

On the cusp of springtime, Alaskans encounter unexpected roadblocks in their struggle for survival. Glenn Villeneuve injures his foot while traveling in deep snow.

Hundreds of islands are scattered along Scotland's vast coastline; people have long found a way to live alongside animals here and increase marine protection.

We follow the three species of North American bears as they fight to survive in a rapidly changing world; it is not necessarily the strongest who will survive, but the most courageous and creative.

On the cusp of springtime, Alaskans encounter unexpected roadblocks in their struggle for survival. Glenn Villeneuve injures his foot while traveling in deep snow.

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

Biologist and extreme angler Jeremy Wade has hunted a legendary Amazon giant for over 20 years. Locals call it the lau-lau, a creature so huge that it's said to swallow men whole.

On the cusp of springtime, Alaskans encounter unexpected roadblocks in their struggle for survival. Glenn Villeneuve injures his foot while traveling in deep snow.

Eastern Poland is one of Europe's last wild regions; the Biebrza lowlands make up the biggest national park in Poland and are of the utmost value for beavers, otters and countless aquatic birds.

Scientists are uncovering new truths about cats using tech like tracking collars; from cheetahs' agility to Iberian lynx recovery, groundbreaking research and conservation offer hope for wild cats.

Jeremy is on the trail of a new river monster after a corpse is found with highly unusual injuries. He also uncovers a spate of disappearances and a mysterious creature patrolling the water.

As winter comes to a close, Glenn hikes up a mountain to build a snow cave. Meanwhile, in Kiwalik, the Hailstones tow a sled load of meat and a broken snow machine back to Noorvik.

The Lowlands are home to more than 80% of Scotland's population; wildlife has often been pushed to the fringes here, but some species are staging a remarkable comeback in and around its cities.

We follow the three species of North American bears as they fight to survive in a rapidly changing world; it is not necessarily the strongest who will survive, but the most courageous and creative.

As winter comes to a close, Glenn hikes up a mountain to build a snow cave. Meanwhile, in Kiwalik, the Hailstones tow a sled load of meat and a broken snow machine back to Noorvik.

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

Jeremy is on the trail of a new river monster after a corpse is found with highly unusual injuries. He also uncovers a spate of disappearances and a mysterious creature patrolling the water.