NatGeoWild HD Sheep-A-Dee-Doo-Dah: Poorly cows and sick sheep keep the vets on the call. Meanwhile, a drive to get the practice eco-friendly for a sustainable future poses its own problems. (S6, ep 16) 2026-08-15 The Americas and Australia: From vipers to pythons, this gripping deep dive reveals Australia's deadliest snakes, their venom, power and how they rule the wild. (S1, ep 1) 7+ 2026-08-15 Africa: Across the Americas, over 30 rattlesnake species help curb rodent populations and sustain healthy ecosystems. (S1, ep 2) 7+ 2026-08-15 Asia and Europe: Across Asia and Europe, diverse habitats are home to venomous vipers, iconic cobras and powerful constrictors. (S1, ep 3) 7+ 2026-08-15 Romania: Take an aerial journey across Romania and discover the world's biggest Orthodox Cathedral, a narrow-gauge steam train and 'Castle Dracula'. (S4, ep 6) 2026-08-15 Iceland: Take an aerial voyage across Iceland and encounter volcanic eruptions, rare footage of humpback whales feeding and stunning architecture. 7+ (S3, ep 6) 2026-08-16