Nicola Tremain

In a defining moment for the natural world, Gordon Buchanan makes an epic journey round the equator - taking to the skies with experts racing to protect both wildlife and people.

Renowned wildlife filmmaker Gordon Buchanan gets close to wild cheetah in the stunning Kalahari, experiencing first hand the very real dangers these beautiful big cats face.

Steve Backshall visits a hedgehog rescue centre in Surrey founded by Brian May. He meets the dedicated staff and discovering the stories behind some of the animals being treated, helps to release a successfully treated hedgehog back into the wild, and offers advice on how to make a garden into a welcoming environment for the creatures.