BBC Earth HD

'S1/E5 - The Horse'. How did the horse become so fast? Chris Packham explores the evolutionary origin of muscles, hearts and limbs that have come together in one of the most athletic animals on Earth.

'S5/E1 - Down Under: Wilderness Island, Australia'. Ben begins his travels in the remote Wilderness Island, off Australia's north-western cape, to meet a man whose story is as remarkable as the landscape he inhabits.

'S2/E12 - Dark Winter's End'. The end of the winter season means that Chip and Agnes have one last chance to harvest fat caribou until late summer.

'S1/E1 - Hunters and Hunted'. BBC Earth inspires audiences by sharing the incredible wonders of our universe. The channel showcases the work of the world’s foremost factual film makers.

'S2/E4'. On the breathtaking Isle of Skye, Ben Fogle investigate how spiritual and religious power still survives in the face of so many visitors and sets off to discover sacred places.

'Steve Backshall's Extreme Mountain Challenge. S1/E2 - Part 2'. In part two, Steve and the team discover rare wildlife and carnivorous plants, explore dangerous caves, and abseil down the world's highest waterfall, Angel Falls.

'S4/E4'. Michael Portillo explores British Columbia. He discovers how two superpowers nearly came to war over a pig and joins the Royal Canadian Navy to firefight on board the frigate HMCS Regina.

'S1/E2 - The Smoker'. Mount Nyiragongo in the Democratic Republic of Congo erupts. It engulfs the nearby city of Goma with lava, taking 33 lives and destroying almost 4,000 homes.

'S1/E1 - Episode 1'. Following the largest fish in the world on a year-long voyage to find out where they disappear to after feeding en masse on Australia's Ningaloo Reef.

'S4/E8 - York to Edinburgh'. Escape with us aboard the magnificent steam train Tornado as its coupled up with 13 luxury vintage carriages on a 6 hour journey through Yorkshire, to Northumbria and the Borders.

'S4/E5'. Michael Portillo crosses the Atlantic to ride the railroads of America, armed with Appleton's General Guide to the United States, published in 1879.

'S2/E5 - Winged Warriors'. These are the mightiest planes, trains, and ships on earth. Each episode recounts the most exciting and compelling stories from the Mighty franchise, connected together via a common theme.

'S1/E1'. India has 275 species of snakes, more than any other country on the planet.

'S5/E2 - Canada: Freedom Cove'. Ben ventures to the rugged west coast of Canada to live with a family who've hand-built a spectacular floating island on the edge of the Pacific Ocean.

'S2/E13 - The Thaw - The Awakening'. Across Alaska the thaw brings new challenges and dangers for the region. Rising temperatures in Kava cause potential disaster for Sue's business.

'S4/E6'. Michael Portillo crosses the Atlantic to ride the railroads of America, armed with Appleton's General Guide to the United States, published in 1879.

'S4/E8 - York to Edinburgh'. Escape with us aboard the magnificent steam train Tornado as its coupled up with 13 luxury vintage carriages on a 6 hour journey through Yorkshire, to Northumbria and the Borders.