World's Most Dangerous Roads Episode Rating Graph

Ed Gamble and Lou Sanders have been friends for years, so much so that she's bought a 'his 'n' hers' set of driving gloves to tackle a dangerous 1000 kilometres of Iceland.

Another thrilling escapade in the wild - this time sees actor Stephen Mangan and comedian Lara Ricote, who have never met before, aim to reach the northernmost point of Australia.

Another thrill-seeking adventure, this time with long-term mates Joe Wilkinson and Zoe Lyons - who've travelled to gigs together for years - taking on the wilds of eastern Turkey.

Actor Will Mellor cajoles one of his best mates - comedian Keith Lemon - to join him on a high-octane road trip in Albania.

David Harewood and best friend Fraser James swap the sets of Hollywood for a new challenge in Slovenia where they face some of the most dangerous roads in Europe.

Comedians Maisie Adam and Suzi Ruffell wouldn't call themselves road aficionados - it took 10 goes to pass their driving tests between them - but they're tackling Morocco anyway.

Darren Harriott is a former bouncer and self-confessed city boy, while Ria Lina is full of adventurous spirit with a PhD and autism. How will they fare travelling in South Africa?

Jamie-Lee O'Donnell and Saoirse-Monica Jackson, who are best friends and stars of the hit sitcom Derry Girls, head way out of their comfort zone as they tackle rugged Romania.

Rhod Gilbert and friend and fellow comedian Angela Barnes cross Italy's most treacherous Alpine roads in Rhod's first adventure since being treated for cancer.

Hugh Bonneville and Jessica Hynes take a terrifying road trip through the former Russian state of Georgia.

Ed Byrne and Andy Parsons brave temperatures as low as 50 below to drive across Siberia's infamous Road of Bones.

Comedian Sue Perkins and adventurer Charley Boorman travel across Alaska to the notorious Dalton Highway - a dirt track built in the 1970s as a supply road to support the Trans-Alaska oil pipeline. Highway maintenance is a full time job here with avalanche units operating throughout the year. As Arctic conditions close in on them, the pair have to rely on the help of hardcore truckers for whom the highway is home. The rules of the road are: keep the CB radio switched on, don't exceed 50mph, and when an 18-wheel truck comes thundering down the rollercoaster of a road towards you, get out of the way!

Olga Koch and Thanyia Moore - who are friends from the comedy circuit - head to Bulgaria for a high-octane adventure that takes them across two epic mountain ranges.

Hugh Dennis and David Baddiel drive Ethiopia's bone shaking roads to reach Askum, home of the Ark of the Covenant.

During the tail end of the rainy season, Angus Deayton and Mariella Frostrup drive up Madagascar's eastern coast.

Jamali Maddix and Larry Dean experience the Land of the Thunder Dragon, a place of mystery and wonder in the rarely-visited and remote kingdom of Bhutan.