BBC Earth

On the coast, two worlds collide. Coasts are the most dynamic and challenging habitats in the ocean - that brings great rewards but also great danger.

Bad weather causes sea sickness among the team, and their next diving lesson has to be abandoned.

It's time to celebrate, as Steve Backshall's team of ten shark saviours have all passed their dive training and are now fully qualified scuba divers.

Ash and team push through brutal jungle and treacherous rivers toward Table Mountain, battling wildlife, exhaustion and harsh terrain in a relentless bid for the summit.

Robson takes fellow actor Jo Joyner horse riding in the shadow of the Cheviots as he introduces her to Northumberland. An outdoor cookery lesson sees the pair make soda bread.

Robson, his brother David and his uncle Matheson head to the Scottish Highlands to take a pack horse camping trip. They learn to make a cup from wood and find a scenic fishing spot.

In central Africa, Cyril must remain on high alert. In order to find the elusive giant Barracuda he's after, a 100lb and six foot torpedo, he will have to venture very far into a hostile jungle.

Bad weather causes sea sickness among the team, and their next diving lesson has to be abandoned.

It's time to celebrate, as Steve Backshall's team of ten shark saviours have all passed their dive training and are now fully qualified scuba divers.

Feast your eyes on structural marvels brought to life when engineers are forced to go underground.

Swept away in the rapids in Northern Canada, Cyril is on the verge of hypothermia. He's in the northern reaches of the Cree First Nations territory to catch a mythical predator; the freshwater wolf.

Near the Himalaya lies the natural world's best-kept secret - one of the highest concentrations of tigers on Earth.

Episode one of Sue Perkins' Lost In Thailand opens in magnificent Northern Thailand where Sue explores the breath-taking beauty of the Thai Highlands.

In a brutal world where nature is both friend and foe, our ancient powers are just beginning, they must use all their skill and ingenuity to shape their territory and establish their cultures.

Swept away in the rapids in Northern Canada, Cyril is on the verge of hypothermia. He's in the northern reaches of the Cree First Nations territory to catch a mythical predator; the freshwater wolf.

Near the Himalaya lies the natural world's best-kept secret - one of the highest concentrations of tigers on Earth.

In a brutal world where nature is both friend and foe, our ancient powers are just beginning, they must use all their skill and ingenuity to shape their territory and establish their cultures.

Swept away in the rapids in Northern Canada, Cyril is on the verge of hypothermia. He's in the northern reaches of the Cree First Nations territory to catch a mythical predator; the freshwater wolf.

Near the Himalaya lies the natural world's best-kept secret - one of the highest concentrations of tigers on Earth.

Robson takes fellow actor Jo Joyner horse riding in the shadow of the Cheviots as he introduces her to Northumberland. An outdoor cookery lesson sees the pair make soda bread.

Robson, his brother David and his uncle Matheson head to the Scottish Highlands to take a pack horse camping trip. They learn to make a cup from wood and find a scenic fishing spot.

Episode one of Sue Perkins' Lost In Thailand opens in magnificent Northern Thailand where Sue explores the breath-taking beauty of the Thai Highlands.

Bad weather causes sea sickness among the team, and their next diving lesson has to be abandoned.

It's time to celebrate, as Steve Backshall's team of ten shark saviours have all passed their dive training and are now fully qualified scuba divers.

Near the Himalaya lies the natural world's best-kept secret - one of the highest concentrations of tigers on Earth.