Natural World: Crocodile Blues

The gharial, the world's oldest crocodilian, is on the very edge of extinction. These bizarre fish-eating reptiles, that live in India's rivers, were already critically endangered, then last winter they were decimated by a mystery die-off. Reptile expert Rom Whitaker has spent 30 years battling to save the gharial, and this year his struggle has finally come to head. Can Rom and his team discover the cause of the die-off? Can they ensure the future of the species through breeding in captivity? And can they observe and film the very last wild animals that, until this year, still bred naturally in the wild?