BBC Earth

The team enter the Serengeti where lions roam free and danger is always near. With water running out, their final challenge awaits.

Asia has the longest coastline of any continent and the earth's richest coral reefs. This episode explores Asia's waters, as spectacular as they are diverse, and never-seen-before animal behaviour.

Nazare in Portugal is the site of the biggest ocean waves ever recorded on Earth. To understand what creates these monsters, we use specialist jet-ski cameras to ride the waves.

After meeting several electric eel attack victims and hearing stories of people who lost their lives, Cyril is determined to catch the biggest one possible and measure its voltage.

Mist swirls around the base of Shanghai's skyline. From the city, tigers and monkeys seem as unreal and distant as dragons and mermaids emerging through the mist. Yet they exist.

Griff hits Memphis to trace the roots of blues, soul, and rock'n'roll on the banks of the Mississippi.

The Congo is one of Africa's wildest rivers and the fish that swim in its waters are even wilder. At 100 lbs, the scary goliath tiger fish is certainly one of the world's most fearsome creatures.

Renowned wildlife film-maker Gordon Buchanan gets close to wild cheetah in the stunning Kalahari, experiencing first-hand the very real dangers these beautiful big cats face.

Stanley Tucci travels through the region of Calabria, discovering the history of this beautiful and troubled place as well as that of his own family.

After fighting a ragged-tooth shark, Cyril's boat is attacked by a bull shark.

The Congo is one of Africa's wildest rivers and the fish that swim in its waters are even wilder. At 100 lbs, the scary goliath tiger fish is certainly one of the world's most fearsome creatures.

Renowned wildlife film-maker Gordon Buchanan gets close to wild cheetah in the stunning Kalahari, experiencing first-hand the very real dangers these beautiful big cats face.

After fighting a ragged-tooth shark, Cyril's boat is attacked by a bull shark.

The Congo is one of Africa's wildest rivers and the fish that swim in its waters are even wilder. At 100 lbs, the scary goliath tiger fish is certainly one of the world's most fearsome creatures.

Renowned wildlife film-maker Gordon Buchanan gets close to wild cheetah in the stunning Kalahari, experiencing first-hand the very real dangers these beautiful big cats face.

Griff hits Memphis to trace the roots of blues, soul, and rock'n'roll on the banks of the Mississippi.

After fighting a ragged-tooth shark, Cyril's boat is attacked by a bull shark.

Robson is joined by his footballing hero, Alan Shearer. The pair go mackerel fishing off the Northumberland coast, spot dolphins in the wild and go flying in vintage aircraft.

Robson joins singer KT Tunstall in her home territory of Fife as they explore the beaches of her childhood near St Andrews, followed by a sea shanty workshop and jewellery making.

Nazare in Portugal is the site of the biggest ocean waves ever recorded on Earth. To understand what creates these monsters, we use specialist jet-ski cameras to ride the waves.