Charley embarks on another epic journey, this time exploring America. He begins by exploring the lava fields of Hawaii Island and then taking to the waters off Waikiki Beach in an outrigger canoe. Charley then heads north to Alaska, where he tries to fulfil a boyhood dream of building an igloo, before sampling life on the high seas when he boards a 100-year-old schooner for a trip off the Atlantic coast

Charley hooks up with the Mounties in on a training mission, before kicking back to enjoy the Canada Day celebrations. Finally he endures a rough ride when he takes part in a rodeo in Saskatchewan.

In the first episode of Extreme Frontiers, Charley and his team go ice hunting in Newfoundland, Lobster fishing and fresh water diving in Tobermory.

Charley heads to Walker County in Georgia and goes potholing with the local fire department's rescue team, before making the eight-hour ride to Mississippi to find out about the logging industry around the state's great river. Charley then rides down to Louisiana to discover more about the formation of modern America in New Orleans, before being taught the art of catching frogs in the swamps of Lafayette. He then tries rodeo-riding at a ranch in Texas and ends this leg of his journey in New Mexico

Charley rides his motorcycle to North Carolina, where he takes to the air in a replica of the Wright brothers' historic biplane and dives to the wreck of a First World War U-boat scuttled by the Germans when they realised the war was lost. In Charlotte, he learns about the War of Independence and gets to grips with firing a traditional musket, before heading to the Chattooga River in South Carolina, the location where his father John filmed 1972 thriller Deliverance

Charley samples South African life from three differing perspectives – in the air, deep below ground and in the bush. He starts by taking to the skies as he learns how to parajet. Although delivering some of the most spectacular views of South Africa, this is an activity that requires great skill to master, as Charley finds out. He then heads underground in order to get to grips with one of South Africa’s oldest working gold mines, and tries his hand blasting for the precious metal himself. Charley rounds off the episode by visiting South Africa’s flagship Kruger National Park. Extending over 7,300 square miles, this is the country's largest game reserve. Charley is hoping to encounter rhinos, hippos, elephants, crocodiles and giraffes. On a ‘wilderness experience on wheels’, he spends three days traversing the Lebombo Eco-Trail, enjoying the sounds and scents of the bush, getting up close to Africa's greatest wild animals and enjoying traditional bushveld dinners around the campfire.

This week, Charley meets a research team who study scorpions and risks life and limb learning how to handle one of the world’s most venomous creatures. Heading into the centre of the country, Charley gets behind the wheel of some of the giant trucks and machines used in the open iron ore mines. Moving west, the team spends two nights learning the way of the nomad with the San tribe in the desolate Kgalagadi National Park, before reaching the western coast. Venturing into the ocean once more, Charley goes diving in the open waters for diamonds, before ending the episode, and the series, in true Boorman style – leading a convoy of over 300 bikers from the Meer lust Winery through the beautiful mountains and beaches of Cape Town, to Signal Hill, renowned for its spectacular views.

Charley begins in Cape Town and abseils from the summit of Table Mountain before crossing shark-infested waters to Robben Island, where Nelson Mandela was incarcerated for 18 years. At Gansbaai, he cage-dives while great white sharks are fed bait, then makes his way up the coast to the Shamwari Wildlife Reserve, where he is introduced to some of the lions and leopards rescued by the Born Free Foundation.