BBC Earth HD

'S3/E4 - Fresh Water'. Fresh water is the lifeblood of planet Earth, where incredible animal dramas play out. From death-feigning fish to frogs that glide, each depends on fresh water for their survival.

'Alan Cumming's Most Luxurious Train Journeys: Scotland. S1/E2 - Episode 2'. In this leg of the journey Alan gets treated to some serious pampering in the onboard spa, while surrounded by stunning views.

'Sue Perkins' Big Adventure: Paris To Istanbul. S1/E6'. It's journey's end as Sue reaches Istanbul. She has her fortune told, falls in love with Turkish delight and explores the world's largest underground caves.

'S1/E1 - Columbus'. James May gets hands on with history to chart the life of Christopher Columbus, who tried to sail to Asia but bumped into somewhere else entirely - and changed the world forever.

'S1/E5'. The race has reached its fifth and penultimate leg as the four celebrities and their loved ones navigate their way 1500km north from Sarajevo to Germany's capital, Berlin.

'S1/E1'. Deep in the Egyptian desert, British archaeologist Howard Carter and his team slowly peel the bandages off Tutankhamun. It takes six days. Original photographs and Carter's extensive diary entries recreate the historic moment.

'S3/E4 - Fresh Water'. Fresh water is the lifeblood of planet Earth, where incredible animal dramas play out. From death-feigning fish to frogs that glide, each depends on fresh water for their survival.

'Hidden Frontiers: Arabia with Reza Pakravan. S1/E4'. Reza uncovers the mystery of human survival in Oman-one of the driest places on earth.

'Hidden Frontiers: Arabia with Reza Pakravan. S1/E5'. Reza sets off on a quest to be the first to capture the mysterious Dugongs of Bahrain on camera.

'Sue Perkins' Big Adventure: Paris To Istanbul. S1/E6'. It's journey's end as Sue reaches Istanbul. She has her fortune told, falls in love with Turkish delight and explores the world's largest underground caves.

'S5/E4 - Portugal'. From a vineyard that has been making one of Britain's favourite tipples - Port - travel down the line that once transported it to the city that gave it its name: Porto.

'S5/E5 - Italy'. We're celebrating Italy and following the Neapolitan Line. Travelling west from the gelato shops of the seaside town of Pescara, we cross Italy through the wild Apennine Mountains.

'S1/E3 - Water'. From freshwater jungle ponds to the dark depths of the open ocean, air breathing mammals have found remarkable ways to overcome the many challenges of a life in water.

'S1/E4 - Cold'. From ice-covered seas to snow-capped mountains, mammals have conquered the cold, living in the harshest places on earth, thanks to their remarkable intelligence and adaptations.

'S1/E5 - Heat'. From the barren Australian outback to the remote, dry deserts of Namibia, mammals use their ingenuity, incredible intelligence and remarkable resilience to beat the heat.

'Big Adventures: Into Thailand with Sue Perkins. S1/E1 - Episode 1'. Episode one of Sue Perkins' Lost In Thailand opens in magnificent Northern Thailand where Sue explores the breath-taking beauty of the Thai Highlands.

'Big Adventures: Into Thailand with Sue Perkins. S1/E2 - Episode 2'. Sue heads south to the turquoise waters of Phuket. She learns how destructive humans can be to the fragile coral reefs.

'Big Adventures: Into Thailand with Sue Perkins. S1/E3 - Episode 3'. Sue reaches the final episode with a visit to the country's heady and exotic capital, Bangkok.

'S1/E3'. Discover how trees can extend their lives by 'walking' across the land and planting new roots, how they can 'learn' from trauma, and how a decaying tree has the miraculous ability to nurture new life.

'S2/E1 - New Zealand'. Ben returns to New Zealand to visit the Long family, who live a hunter-gatherer lifestyle on the country's South Island that's two days' hike from the nearest road.

'S2/E2 - Georgia'. Ben Fogle reunites with a man living in the swamplands of Georgia, who has experienced a life-changing accident in the six years since they first met.

'S1/E1 - America's Lost City'. Ben heads to Slab City in the Californian desert to explore an alternative community.

'S1/E6'. It's a race to the finish line in Tromsø for the four celebrity teams. Which will get there first and be crowned champions?

'Alan Cumming's Most Luxurious Train Journeys: Scotland. S1/E3 - Episode 3'. In the picturesque village of Plockton, Alan and his fellow guests explore the coastal marvels of Scotland on a boat trip overlooking the Isle of Skye.

'S3/E4 - Fresh Water'. Fresh water is the lifeblood of planet Earth, where incredible animal dramas play out. From death-feigning fish to frogs that glide, each depends on fresh water for their survival.

'S1/E2 - Raleigh'. James May charts the life of Sir Walter Raleigh, the most famous man in Elizabethan England, who discovered potatoes and tobacco, and went to America to build England's first colony - except he didn't.

'S1/E1 - America's Lost City'. Ben heads to Slab City in the Californian desert to explore an alternative community.

'S1/E1'. Deep in the Egyptian desert, British archaeologist Howard Carter and his team slowly peel the bandages off Tutankhamun. It takes six days. Original photographs and Carter's extensive diary entries recreate the historic moment.

'S1/E6'. It's a race to the finish line in Tromsø for the four celebrity teams. Which will get there first and be crowned champions?

'Alan Cumming's Most Luxurious Train Journeys: Scotland. S1/E3 - Episode 3'. In the picturesque village of Plockton, Alan and his fellow guests explore the coastal marvels of Scotland on a boat trip overlooking the Isle of Skye.

'S3/E4 - Fresh Water'. Fresh water is the lifeblood of planet Earth, where incredible animal dramas play out. From death-feigning fish to frogs that glide, each depends on fresh water for their survival.

'S1/E2 - Raleigh'. James May charts the life of Sir Walter Raleigh, the most famous man in Elizabethan England, who discovered potatoes and tobacco, and went to America to build England's first colony - except he didn't.

'S1/E1 - America's Lost City'. Ben heads to Slab City in the Californian desert to explore an alternative community.

'S1/E6'. It's a race to the finish line in Tromsø for the four celebrity teams. Which will get there first and be crowned champions?

'S1/E5'. The race has reached its fifth and penultimate leg as the four celebrities and their loved ones navigate their way 1500km north from Sarajevo to Germany's capital, Berlin.

'Hidden Frontiers: Arabia with Reza Pakravan. S1/E5'. Reza sets off on a quest to be the first to capture the mysterious Dugongs of Bahrain on camera.

'S2/E5 - Fiji, Pacific Ocean'. Ben Fogle is reunited with seafarer Rick, who made a fresh start on the Pacific island of Fiji after previously living off the coast of French Polynesia.

'S1/E3 - Episode 3'. In the final episode of her epic Alaskan adventure, Sue rounds off this trip of a lifetime by heading even further off the beaten track and visiting amazing communities living in the extreme wilderness.

'Sue Perkins' Big Adventure: Paris To Istanbul. S1/E6'. It's journey's end as Sue reaches Istanbul. She has her fortune told, falls in love with Turkish delight and explores the world's largest underground caves.

'S10/E5 - Zambia'. Ben journeys into Zambia to live with a British family who have built a safari lodge on the edge of a national park. Ben uncovers what motivates them to keep going.

'S10/E17 - A Game of Chance'. Alaskans gather food and make upgrades to their homes as the Arctic Summer wanes.

'S1/E6 - Forest'. From deep in the undergrowth to the highest tree, forests are home to two-thirds of all mammal species. Discover how they overcome the many challenges of life in a crowded world.

'S2/E6 - British Columbia, Canada'. Ben Fogle revisits former war correspondent Julius Strauss and his wife Kristin, who live in British Columbia. Their home is in the middle of a mountainous region that is home to grizzly bears.

'Hidden Frontiers: Arabia with Reza Pakravan. S1/E6'. Reza ventures into an unexplored canyon in Saudi Arabia, searching for clues of lost civilizations.

'S5/E5 - Italy'. We're celebrating Italy and following the Neapolitan Line. Travelling west from the gelato shops of the seaside town of Pescara, we cross Italy through the wild Apennine Mountains.

'S1/E8 - Thunderstorms'. There are about 2,000 thunderstorms taking place on Planet Earth at any given time. Despite their exhilarating beauty, they can be deadly.

'S3/E4 - Fresh Water'. Fresh water is the lifeblood of planet Earth, where incredible animal dramas play out. From death-feigning fish to frogs that glide, each depends on fresh water for their survival.

'Big Adventures: Into The Gobi Desert With Nick Knowles. S1/E1'. Nick's first sight in the Gobi is truly awe-inspiring. Thundering towards him are the Namnaa horse archery academy.

'S5/E6 - Africa'. Starting from one of the world's most remote cities, Walvis Bay, in Namibia, we roll 1,500 miles through the Kalahari desert to Pretoria, South Africa's Executive Capital.

'S1/E1 - Ending HIV in America'. The story behind the extraordinary scientific progress in the fight against HIV, 40 years after its initial outbreak shook the world.

'S3/E5 - Forests'. Sir David Attenborough journeys into the forests, where dogs communicate with whistles, treehoppers fight assassin bugs, 'spirit bears' fish, and hornbills imprison themselves in trees.

'S10/E6 - Azores'. On Flores in the Azores, Ben meets a family who live off-grid in a cottage on a steep mountain.

'S10/E18 - Fight the Freeze: Last Taste of Summer'. Our Alaskans seize the final harvests of summer.

'S5/E7 - Denver'. Starting a mile above sea level in Colorado's state capital Denver, our train, the Rocky Mountaineer makes its way through the state of Utah.

'Big Adventures: Into The Gobi Desert With Nick Knowles. S1/E1'. Nick's first sight in the Gobi is truly awe-inspiring. Thundering towards him are the Namnaa horse archery academy.