The final episode of the series visits the frontline of the conflict with the world's top predators, meeting the scientists fighting to save them.
Crossing five continents and combining landmark natural history footage with real-life human drama, it checks the pulse of the earth's iconic animals, including lions, tigers, polar bears and blue whales.
With three-quarters of the planet's carnivores now in decline, can people find ways to live with predators before they disappear forever?
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