British celebrities Sue Perkins and Liza Tarbuck drive the legendary Ho Chi Minh Trail, a dangerous road hacked through mountains and jungles of Laos and Vietnam. Show more

This week Sue and Liza face one of the most challenging sections of their journey, 400km of jungle, dirt tracks and river crossings from the Sepon Mine down to the Vietnam border. Show more

British comedian Sue Perkins and adventurer Charley Boorman travel across Alaska the hard way, in a domestic 4x4 on a route only ever intended for 18 wheel juggernauts. Show more

This week, Sue meets some of the very few locals who live along the route and, in the most challenging leg of their journey, Charley and Sue drive over The Atigun Pass. Show more

British comedians Rhod Gilbert and Greg Davies attempt to drive across Nepal, one of the poorest, least developed, most mountainous countries on earth. Show more

This week Greg and Rhod head towards Kathmandu via the Prthvi Highway - one of Nepal's most dangerous roads. Show more

Adventurer Ben Fogle and comedian Hugh Dennis drive a historic route from the Peruvian Andes to the depths of the Amazon. Show more

Ben and Hugh reach the Huancabamba Canyon, a notoriously unstable road with drops of 300 metres into the river below. Show more

Journalist Mariella Frostrup and actor Angus Deayton have known each other for over twenty years. They are driving up Madagascar's eastern coast at the tail end of the rainy season Show more

This week, Mariella and Angus head towards Mananara. But their journey takes longer than expected because of the treacherous roads caused by a cyclone. Show more

Actors Hugh Bonneville and Jessica Hynes pair up for a terrifying road trip through the former soviet state of Georgia. Driving from the Georgian border with Azerbaijan to the Blac Show more

This week Hugh and Jessica are transported into a land that time forgot, as Georgia and its people delight and surprise them at every turn.

British comedians Phill Jupitus and Marcus Brigstocke head to Bolivia for a high-altitude road trip that promises adrenalin, hilarity and drop-dead beautiful scenery.

This week Phill and Marcus navigate Salar de Uyuni, a salt lake covering 10,500 square kilometres and the largest of its kind in the world. Show more

Good friends and fellow British comedians Ed Byrne and Andy Parsons brave temperatures as low as minus fifty to drive across Siberia's infamous Road of Bones. Show more

Ed and Andy reach the Indigirka River, and after driving through some treacherous condition, they finally arrive at Magadan, a town which marks the final part of their journey, Show more

Comedians Hugh Dennis and David Baddiel drive over 2,000km of Ethiopia's death-defying, bone-shaking roads in a quest to reach Aksum, known as the home of the Ark of the Covenant. Show more

This week, Hugh and David reach the isolated mountain town of Lalibela and visit the last of the 11 churches built by its King. Show more