Meet Kenya's Marsh Pride in the Maasai Mara. As power shifts within the lions, rising human conflict and habitat loss threaten their fight to survive.

A record breaking twister rips through the city of Tuscaloosa. A couple of students have a terrifying close encounter and the city hospital is swamped by hundreds of casualties.

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.

A family and their pets are in danger when a gator finds a cool shady spot under their house, and a training day for intern Grace becomes scary when the team finds a huge gator at a local ranch.

Gary, Arlie and Damon rescue two gators - one near a restaurant and the other at an industrial equipment supplier - while the team gets Gator Country ready for the busiest day of the year.

The Marsh Pride's story deepens through voices of those who film, protect, and oppose them - revealing a fragile future as human expansion drives lions toward decline.

Disgorging more water than the next nine biggest rivers combined, the Amazon is the mightiest of all. Jeremy discovers issues putting the river at risk by tracing the migration of the dorado catfish.

As winter approaches, the Hailstone family receive news of some land they have inherited. Meanwhile, after being stranded for days, Glenn attempts to return to his remote cabin.

In a river ecosystem in Northern Portugal, we follow Eurasian otter, Kiko, from his first explorations outside his family to his independence as a guardian of his territory.

The Waterfront pride takes advantage of the dry season. The Ihahas are minus their males and matriarch. Einstein's new mate approaches his territory with three cubs in tow: the start of a new chapter.

As winter approaches, the Hailstone family receive news of some land they have inherited. Meanwhile, after being stranded for days, Glenn attempts to return to his remote cabin.

Hurricane Harvey rips a coastal town apart and dumps a once-in-a-thousand-years rainfall that drowns Houston.

Disgorging more water than the next nine biggest rivers combined, the Amazon is the mightiest of all. Jeremy discovers issues putting the river at risk by tracing the migration of the dorado catfish.

As winter approaches, the Hailstone family receive news of some land they have inherited. Meanwhile, after being stranded for days, Glenn attempts to return to his remote cabin.

In a river ecosystem in Northern Portugal, we follow Eurasian otter, Kiko, from his first explorations outside his family to his independence as a guardian of his territory.

The Marsh Pride's story deepens through voices of those who film, protect, and oppose them - revealing a fragile future as human expansion drives lions toward decline.

America's mighty Mississippi is under threat from alien invaders, toxic run-off, and massive man-made disruptions. Jeremy meets spirited Americans who want to fix the river's problems.

A power outage in Kavik leaves Sue Aikens scrambling to restore her communications, while Glenn Villeneuve sets out on his most crucial hunt of the year.

Vast forests and high ridges in Romania's Carpathian Mountains host Europe's largest population of brown bears; we follow conservationists as they rewild bison, reforest and survey bear populations.

The Waterfront pride takes advantage of the dry season. The Ihahas are minus their males and matriarch. Einstein's new mate approaches his territory with three cubs in tow: the start of a new chapter.

Hurricane Harvey rips a coastal town apart and dumps a once-in-a-thousand-years rainfall that drowns Houston.

America's mighty Mississippi is under threat from alien invaders, toxic run-off, and massive man-made disruptions. Jeremy meets spirited Americans who want to fix the river's problems.

In a river ecosystem in Northern Portugal, we follow Eurasian otter, Kiko, from his first explorations outside his family to his independence as a guardian of his territory.