Meet the Five Musketeers, five inseparable lion brothers raised in the ancient Namib Desert. When they eventually become independent from their mothers, they venture into the desert in search of their own kingdom-a journey fraught with treacherous terrain and conflict.

The Badlands of America: a geological phenomenon that provides a 75-million-year history lesson, presented layer by colorful layer. By all appearances, it's a hostile place to live.

It's fall in Panama. Across the U.S., birds fly south for the winter, jaguars and coyotes navigate the jungle corridors, and hundreds of sea turtles take over the beaches. This narrow isthmus is a vital pit stop for millions of migrating animals, but it's currently in danger. Development, pollution, and climate change threaten to disrupt this fragile throughway. Researchers are scrambling to address these challenges, using cutting-edge tracking devices to follow the animals and protect the millions that journey along this unique cross-continental passageway.

In the heart of India, young tiger Kumal has been banished from his home. Hungry and alone, he must develop his skills as a predator and a fighter if he has any hope of surviving.

In Rwanda, Africa, a new era is dawning after a brutal civil war ripped through the country, killing close to two million people and wiping out its most iconic wildlife: the regal lion. Now, 25 years later, the big cats are being reintroduced to the region to reclaim their throne.

In Africa's Simien Mountains, Braveheart is the undisputed king of his gelada family. For four years, he has fought off predators, kept the peace, and in return, has had his pick of potential mates.

Two miles from the bustling towns of southern India, the lush Western Ghats rainforest harbors a sacred but deadly deity, the king cobra. Reaching lengths of up to 18 feet and packing enough venom to kill an elephant with a single strike, this apex predator is both revered and feared by its human neighbors.

On the harsh and unforgiving plains of central Namibia, Africa, a young honey badger named Grit has just left home to venture out in the great, wide world, but it won't be easy. Fewer than half of all young honey badgers survive their first few weeks on their own, as they deal with intense heat, starvation, and round-the-clock threats from the many predators of the savannah.