BBC Earth HD

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.

Mike Wozniak and Ola Labib head to one of the wildest places on Earth - the Namib desert - to meet for the first time and have each other for company on their journey.

On this final leg of his journey, Ben encounters the mighty Congo River for the first time. A trade super-highway.

The Arctic Vets team do whatever it takes to save the lives of sick animals.

After a week in deepest Turkey, Alice Roberts finally arrives in Istanbul to learn about how the clever Ottoman tactics required to wrestle the city from the Romans.

Alaskans contend with the throes of the warm season.

Ben travels to Dorset to live for a week with Chris, a former paratrooper who has spent the last five years walking Britain's coastline, finding love and raising thousands for charity.

Mike Wozniak and Ola Labib head to one of the wildest places on Earth - the Namib desert - to meet for the first time and have each other for company on their journey.

On this final leg of his journey, Ben encounters the mighty Congo River for the first time. A trade super-highway.

Ben journeys to the Ozark National Forest, to live with master craftsman Robert.

Sue fixes her Nodwell. Andy and Denise install solar panels. Jessie repairs his boat. The Hailstones go fishing.

In this final episode, the archaeologists complete the excavation of a wealthy residence, a bakery, and a laundry and, in doing so, discover evidence of what people were doing in the city during its final hours.

Adventurer Ben Fogle meets Vanessa Forero deep in the Sierra Nevada de Santa Marta, an isolated mountain range in the north of Columbia.

Alaskans harness the power of the sun as they toil through summer.

Reza explores the possibility of human habitation in an impenetrable canyon system in Oman.

Following Odysseus' trail, Bettany takes a predawn trip to Delos, then sets sail to Ikaria.

The drama now centres around the river where enchanting new characters, such as an adorable baby hippo, meet old favourites. Bonds of kinship are tested as adventures continue.

David Harewood and best friend Fraser James swap the sets of Hollywood for a new challenge in Slovenia where they face some of the most dangerous roads in Europe.

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.

Bettany heads to Santorini, the site of one of the biggest volcanic eruptions in history, before heading over to Naxos and then Siphos.

Hannah Fry reveals the miraculous technologies that define the modern world.

Ben travels to New Zealand's North Island, where he meets a young nomadic family led by Amber and Andy, who spend their life exploring the country's wild landscapes.

Sue cleans up her river and goes fishing. Andy and Denise repair a Jeep. Jessie falls trees and prepares wood. The Hailstones build a trapping cabin.

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

David Harewood and best friend Fraser James swap the sets of Hollywood for a new challenge in Slovenia where they face some of the most dangerous roads in Europe.