BBC Earth

On the famous Ho Chi Minh Trail, Guy visits a Huey helicopter graveyard, makes his own version of napalm and comes face to face with a live cluster bomb left over from the war.

Heading across to India and the Maldives, Robson fishes for frogfish, manta rays, groupers and others with the help of local anglers.

Deserts are hostile to life. Temperatures soar and plummet and water is rare. Yet even here plants have found ingenious ways to survive.

The team travel through Azerbaijan, Georgia and Turkey, where they re-join the First Overland route at last. Now it's a road-race through Europe to be home in time for Christmas.

Over in the United States, Robson heads to sea to catch bull shark, blue tilapia, remora and many other fish.

A team of scientists and filmmakers heads to Antarctica to study the most sophisticated hunts in the animal kingdom - killer whales making waves to wash seals off floating ice.

Nick nicknames his new adventure 'The Volcano Express' as he is travelling from Mount Vesuvius to Mount Etna on a journey from Naples to Sicily.

A look at how the giant supercontinent Rodinia broke up 800 million years ago. Earth's tectonic forces ripped the land apart, kicking off a series of events that sent temperatures plummeting.

Over in the United States, Robson heads to sea to catch bull shark, blue tilapia, remora and many other fish.

Nick nicknames his new adventure 'The Volcano Express' as he is travelling from Mount Vesuvius to Mount Etna on a journey from Naples to Sicily.

A look at how the giant supercontinent Rodinia broke up 800 million years ago. Earth's tectonic forces ripped the land apart, kicking off a series of events that sent temperatures plummeting.

The team travel through Azerbaijan, Georgia and Turkey, where they re-join the First Overland route at last. Now it's a road-race through Europe to be home in time for Christmas.

Deserts are hostile to life. Temperatures soar and plummet and water is rare. Yet even here plants have found ingenious ways to survive.

A team of scientists and filmmakers heads to Antarctica to study the most sophisticated hunts in the animal kingdom - killer whales making waves to wash seals off floating ice.

Nick nicknames his new adventure 'The Volcano Express' as he is travelling from Mount Vesuvius to Mount Etna on a journey from Naples to Sicily.

The team travel through Azerbaijan, Georgia and Turkey, where they re-join the First Overland route at last. Now it's a road-race through Europe to be home in time for Christmas.

Over in the United States, Robson heads to sea to catch bull shark, blue tilapia, remora and many other fish.