In 1912, the largest volcano eruption of the 20th century laid waste to one of the most pristine corners of Alaska. Today, the Valley of 10,000 Smokes has become a home to one of the largest bear populations in the world.
She experiences the rainforest for the first time travelling to the heart of the island with expert Glen Reynolds, before observing orangutans in the wild and learning how they are helping to prevent global warming. She then journeys down Borneo's Kinabatangan river and along the island's coastline to explore the unique wildlife that lives in this threatened environment.
David Attenborough narrates the story of Rodrigo Medellin. Since he first kept vampire bats in his bathroom as a child, Rodrigo has dedicated his life to saving them. Now Mexico's most famous export, tequila, is at stake. Rodrigo's beloved lesser long-nosed bat is crucial to the liquor - pollinating the plants the drink is made from. To save both, Rodrigo must track the bats' epic migration across Mexico - braving hurricanes, snakes, Mayan tombs and seas of cockroaches. The threats are very real for not only Rodrigo and the bats, but also for anyone with a taste for tequila.
Deep in the rainforest of Central Africa lies an elephant oasis - a remarkable place that holds the key to the future for forest elephants. Over the last 20 years, Andrea Turkalo has been studying these enigmatic giants, getting to know over 4,000 intimately. She has begun to unravel the secrets of their complex social lives and the meanings of their unique vocalisations. New acoustic research is shedding light on the many mysteries that still surround forest elephant society. Will these endangered elephants finally speak out and tell Andrea what it is they need to survive?
For a river that conjures up images of pyramids and pharaohs, the Nile turns out to be a truly surprising river that changes at every twist and turn of its journey. As its flows into increasingly arid latitudes on its journey north it becomes an evermore vital lifeline for animals and people, but only if they can conquer the challenges that this ever-changing river throws at them.