BBC Earth HD

'S8/E7 - Crickhowell, Wales'. Ben meets the Powell family who are living an off-grid existence in a hidden valley in the Black Mountains in Wales. While there he helps plant the biggest new woodland in Wales for a generation.

'S5/E11'. A tornado touchdown terrorises a school in Texas. The violent volcanic eruption in Tonga and a tsunami leaves residents trapped with nowhere to go and pilots battle extreme cross winds.

'Alan Cumming's Most Luxurious Train Journeys: Scotland. S1/E3'. In the picturesque village of Plockton, Alan and his fellow guests explore the coastal marvels of Scotland on an enthralling seal-spotting boat trip.

'S1/E3 - St Petersburg'. Dr Janina Ramirez and Alastair Sooke discover St Petersburg through its art and architecture, looking to see how art has been used to enhance prestige and power in this city.

'S1/E3'. Alexander begins in Mumbai, riding the city's gleaming new metro before venturing into a forest with the world's highest concentration of leopards.

'Big Adventures: into the Amazon with Robson Green. S1/E1'. Robson's journey begins in Alter do Chao, known as the gateway to the rainforest, and the Amazon's answer to the Caribbean.

'S8/E7 - Crickhowell, Wales'. Ben meets the Powell family who are living an off-grid existence in a hidden valley in the Black Mountains in Wales. While there he helps plant the biggest new woodland in Wales for a generation.

'S5/E11'. A tornado touchdown terrorises a school in Texas. The violent volcanic eruption in Tonga and a tsunami leaves residents trapped with nowhere to go and pilots battle extreme cross winds.

'Alan Cumming's Most Luxurious Train Journeys: Scotland. S1/E3'. In the picturesque village of Plockton, Alan and his fellow guests explore the coastal marvels of Scotland on an enthralling seal-spotting boat trip.

'S1/E3 - St Petersburg'. Dr Janina Ramirez and Alastair Sooke discover St Petersburg through its art and architecture, looking to see how art has been used to enhance prestige and power in this city.

'S1/E3'. Alexander begins in Mumbai, riding the city's gleaming new metro before venturing into a forest with the world's highest concentration of leopards.

'S5/E6'. In Germany, floods tear through central European towns and villages. In Nepal a landslide threatens local communities. In California, wildfires tear through the states forests and farms.

'S1/E1'. Tony Robinson uncovers machines that are the world's unsung heroes. From a vehicle that makes airport runways safe for landing, to the atomic clocks keeping humankind on time.

'S1/E5 - Offshore Wind'. To harness the vast power of the ocean's winds, engineers must build bigger and better turbines.

'S1/E2'. Continuing his Indian Adventure, Alexander Armstrong visits the pink city Jaipur, the Silk City Ramanagara & Bandipur National Park.

'S2/E2 - Frozen Ocean'. Frozen Planet returns with a spellbinding journey through magical icy lands.

'S2/E3 - Frozen Peaks'. Frozen Planet returns with a spellbinding journey through magical icy lands.

'S12/E13 - Into the Tundra'. The everyday struggles of living in the secluded state of Alaska where one wrong decision could cost you your life.

'S12/E14 - Mama's Home'. The everyday struggles of living in the secluded state of Alaska where one wrong decision could cost you your life.

'S12/E15 - Rising Waters'. Alaskans must rely on family to overcome rising waters as they seek the spring's offerings. The Hailstones must work together to overcome a quickly flooding tundra.

'S6/E13'. A historic flood wipes out Valencia, Oregon's third largest wildfire, and the deadliest hurricane to hit U.S. in almost 20 years.

'S2/E1 - Atlantis'. Dan Snow travels to Greece to investigate whether there is any truth to the story of the mythical city of Atlantis, which disappeared beneath the waves.

'S2/E2 - Machu Picchu'. Dan Snow takes us to Machu Picchu, where the secrets of the Inca civilisation are waiting to be unearthed.

'S2/E7 - Our Blue Planet'. David Attenborough explores the issues behind the series' most spectacular stories and examines the future of the planet.

'S3/E8 - Heroes'. David Attenborough introduces conservation heroes fighting to save the world's wildlife, from exploring remote jungles to going undercover to catch criminals in the illegal ivory trade.

'S1/E6 - Facing The Monster - Part 2'. Cyril faces snapping turtles, invasive jumping carp, and dangerous gators while hunting a 200-pound alligator gar in the perilous waters of Texas and Louisiana.

'S1/E6 - Next-Gen Solar'. Meet the engineers creating a new wave of solar megastructures that are super-efficient and even work at night.

'S1/E3'. Alexander begins in Mumbai, riding the city's gleaming new metro before venturing into a forest with the world's highest concentration of leopards.

'S1/E2 - Egypt'. Ancient Egypt is seen in the time of the Ptolemies, its longest-serving and final dynasty. In 51 BC Cleopatra becomes Queen of Egypt - and Pharaoh.

'S2/E6'. In this series finale, teams face their biggest challenge yet, racing a budget crippling 2750km, across the mighty Andes into Chile. With just 39 minutes separating all four teams, it is all to play for.

'S1/E1 - America First'. At the dawn of a new space race, the personal stories of those who led us here offer a new and deeply human perspective on our changing world - and where we are headed.

'S3/E8 - Heroes'. David Attenborough introduces conservation heroes fighting to save the world's wildlife, from exploring remote jungles to going undercover to catch criminals in the illegal ivory trade.