BBC Earth HD

'S1/E4'. Entering The Balkans by sleeper train, Alice Roberts is in Bulgaria's capital Sofia. She'll learn how the empire was controlled from Istanbul and how today the landscape today is almost entirely Soviet.

'S1/E4'. Tony Robinson explores machines that help us mere mortals become superhuman. From a tree-chopping-device faster than twenty lumberjacks, to a jet-powered suit that could be worn by flying paramedics.

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

'S10/E10 - Thailand'. Ben meets Niall, who rescues and cares for street dogs in Koh Samui.

'S11/E4 - Off the Deep End'. Alaskans rediscover old practises to get through the heart of winter.

'S1/E5'. In her final chapter, Alice Roberts takes a train to the western point of the Ottoman Empire, Budapest to learn how it ended.

'S1/E3'. We meet entrepreneurs Shona and Lewis who've given up their jobs for their passion.

'S1/E4'. Tony Robinson explores machines that help us mere mortals become superhuman. From a tree-chopping-device faster than twenty lumberjacks, to a jet-powered suit that could be worn by flying paramedics.

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

'S10/E10 - Thailand'. Ben meets Niall, who rescues and cares for street dogs in Koh Samui.

'S11/E4 - Off the Deep End'. Alaskans rediscover old practises to get through the heart of winter.

'S1/E5'. In her final chapter, Alice Roberts takes a train to the western point of the Ottoman Empire, Budapest to learn how it ended.

'S1/E3'. We meet entrepreneurs Shona and Lewis who've given up their jobs for their passion.

'S1/E4 - Japan'. By the mid-19th century, Japan has been cut off from outside western influence for more than 200 years.

'S1/E1'. Paul Whitehouse and Bob Mortimer tour the country's finest fishing spots and talk a lot of nonsense. Paul and Bob fish for tench in Norfolk and reminisce about their childhood.

'S1/E2 - The Russian Thing'. This episode looks at the origins of the Mir space station and how the US and Russia worked together.

'World's Most Amazing Walks With Robson Green. S1/E3 - Scotland'. Robson Green is in Scotland, a walkers' paradise hiking the Great Glen Way.

'S2/E2'. Ben Fogle journeys to Islay and Jura, tracing the route of 6th-century Christian monks across wild seaways to discover communities going the extra mile to look out for one another.

'S1/E3'. We meet entrepreneurs Shona and Lewis who've given up their jobs for their passion.

'S1/E4'. Tony Robinson explores machines that help us mere mortals become superhuman. From a tree-chopping-device faster than twenty lumberjacks, to a jet-powered suit that could be worn by flying paramedics.

'S10/E10 - Thailand'. Ben meets Niall, who rescues and cares for street dogs in Koh Samui.

'S11/E4 - Off the Deep End'. Alaskans rediscover old practises to get through the heart of winter.

'S1/E6 - Alaska: Last American Frontier'. In southeast Alaska, there's an ice-bound Eden that harbors possibly the richest temperate rainforests of all.

'S2/E3'. Ben Fogle heads for the Orkney Isles to investigate Norse Christian heritage and how they are a place of modern pilgrimage, offering a place of deep time and space to reconnect.

'World's Most Amazing Walks With Robson Green. S1/E4 - Normandy'. Robson Green walks in the footsteps of the brave soldiers of the D-Day landings in Normandy, France, on an emotional journey of sacrifice and courage.

'S1/E4'. Entering The Balkans by sleeper train, Alice Roberts is in Bulgaria's capital Sofia. She'll learn how the empire was controlled from Istanbul and how today the landscape today is almost entirely Soviet.

'Sue Perkins' Big Adventure: Paris To Istanbul. S1/E1'. In Paris, Sue samples insects and absinthe, models for Paris Fashion Week, and crashes a cabaret.

'S1/E1'. Virologist Dr Chris van Tulleken embarks on a global investigation into the hunt for the pathogen that could trigger the next pandemic and the cutting-edge science developed to tackle it.

'S1/E4'. Meet the organisers and riders of the Bealach Mor, one of Britain's toughest cycling events.

'S1/E5'. In her final chapter, Alice Roberts takes a train to the western point of the Ottoman Empire, Budapest to learn how it ended.

'S22/E5 - Grand Designs: 25 Years and Counting'. To mark 25 years of the nation's favourite homebuilding programme, Kevin McCloud celebrates the triumphs and commiserates the disasters as he looks back at some iconic moments.

'S2/E1'. Aspiring midwife Anthea, who's 18, has a difficult tumour that may put her arm at risk. Cameron, who's 43, is offered a last roll of the dice with a radical procedure to combat an aggressive cancer.

'S10/E11 - Lincolnshire'. Ben heads to northern England and stays with host Paul in Lincolnshire onboard his 30-year-old converted military truck. He discovers why Paul traded living in a house for life on the road.

'S11/E5 - Going in Circles'. Alaskans take advantage of a brief reprieve from Dark Winter's wrath.

'S1/E1'. Starting in Alexandria, Alice searches for Cleopatra, discovers how the Romans and the Greeks reacted to the treasures of Ancient Egypt, and learns how a slave became a sultan and built his own caste

'S1/E4'. Meet the organisers and riders of the Bealach Mor, one of Britain's toughest cycling events.

'S22/E5 - Grand Designs: 25 Years and Counting'. To mark 25 years of the nation's favourite homebuilding programme, Kevin McCloud celebrates the triumphs and commiserates the disasters as he looks back at some iconic moments.

'S2/E1'. Aspiring midwife Anthea, who's 18, has a difficult tumour that may put her arm at risk. Cameron, who's 43, is offered a last roll of the dice with a radical procedure to combat an aggressive cancer.

'S10/E11 - Lincolnshire'. Ben heads to northern England and stays with host Paul in Lincolnshire onboard his 30-year-old converted military truck. He discovers why Paul traded living in a house for life on the road.

'S11/E5 - Going in Circles'. Alaskans take advantage of a brief reprieve from Dark Winter's wrath.

'S1/E1'. Starting in Alexandria, Alice searches for Cleopatra, discovers how the Romans and the Greeks reacted to the treasures of Ancient Egypt, and learns how a slave became a sultan and built his own caste

'S1/E4'. Meet the organisers and riders of the Bealach Mor, one of Britain's toughest cycling events.

'S1/E3 - Aztecs'. We explore the lost world of the Aztecs, asking how and why their vast warrior empire came crashing down in just two short years.

'S1/E5'. In her final chapter, Alice Roberts takes a train to the western point of the Ottoman Empire, Budapest to learn how it ended.

'World's Most Amazing Walks With Robson Green. S1/E4 - Normandy'. Robson Green walks in the footsteps of the brave soldiers of the D-Day landings in Normandy, France, on an emotional journey of sacrifice and courage.

'S2/E3'. Ben Fogle heads for the Orkney Isles to investigate Norse Christian heritage and how they are a place of modern pilgrimage, offering a place of deep time and space to reconnect.

'S1/E4'. Meet the organisers and riders of the Bealach Mor, one of Britain's toughest cycling events.

'S1/E2 - The Russian Thing'. This episode looks at the origins of the Mir space station and how the US and Russia worked together.

'S10/E11 - Lincolnshire'. Ben heads to northern England and stays with host Paul in Lincolnshire onboard his 30-year-old converted military truck. He discovers why Paul traded living in a house for life on the road.

'S11/E5 - Going in Circles'. Alaskans take advantage of a brief reprieve from Dark Winter's wrath.

'S1/E1 - Dark'. The dark, a world of opportunity for mammals. More than two-thirds prefer the cover of the night, with some now returning to the safety of the shadows in order to avoid us.

'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.

'World's Most Amazing Walks With Robson Green. S1/E5 - Portugal'. Robson Green walks a beautiful but lesser-known route in the Douro Valley in Northern Portugal, rich in ancient art, wildlife and world-famous wine.

'S1/E5'. In her final chapter, Alice Roberts takes a train to the western point of the Ottoman Empire, Budapest to learn how it ended.

'Sue Perkins' Big Adventure: Paris To Istanbul. S1/E2'. Sue finds her true calling as a mermaid, bathes in a tub of beer, and takes up Bavarian dancing for Munich Pride.

'S3/E1'. Famous faces Roman Kemp, Dylan Llewellyn, Anita Rani, Molly Rainford and Tyler West set off with a loved one on an epic 5,900km race across Central America.

'S1/E1'. After a lifetime of travels that have taken her across the globe, Joanna Lumley is making her most personal journey yet, travelling from Essex to Whitby.

'S1/E1'. Starting in Alexandria, Alice searches for Cleopatra, discovers how the Romans and the Greeks reacted to the treasures of Ancient Egypt, and learns how a slave became a sultan and built his own caste

'S11/E11 - Morocco'. Ben heads to the African continent to visit former army officer Mark, who, over 17 years, built a stunning home on the Moroccan coast.

'S3/E2'. The race to the Guajira Peninsula is under way. The teams can choose to travel through Guatemala, southern Belize or Honduras to reach the second checkpoint of El Zonte in El Salvador.

'S10/E12 - Sri Lanka'. Ben stays with Naveen and Anke who have made their home in the Sri Lanka's highlands. He uncovers why they swapped one of the biggest cities in the world for a simple off-grid existence miles from civilisation.

'S11/E6 - From Here to There'. Alaskans test their will and luck against Dark Winter's obstacles.

'S1/E2'. Alice arrives in Cairo by train with a book she first read as a youth: A Thousand Miles Up the Nile by Victorian Egyptologist Amelia Edwards. Alice follows Edwards' footsteps to the Great Pyramids.

'S1/E1'. After a lifetime of travels that have taken her across the globe, Joanna Lumley is making her most personal journey yet, travelling from Essex to Whitby.