Alaska: And you thought the M25 was bad. Sue Perkins and Charley Boorman trek across Alaska on the notorious Dalton Highway, battling Arctic conditions on a glorified dirt track. [S]
Nepal: Comedians Rhod Gilbert and Greg Davies won't be laughing too much as they dodge reckless drivers, floods and landslides on an ambitious drive through mountainous Nepal. [S]
Peru: Celebs Ben Fogle and Hugh Dennis face risky hairpin bends and terrifying 2,000ft drops as they wind their way through the Peruvian Andes in search of a fabled lost city. [S]
Bulgaria: 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. [S,AD]
Nepal: Comedians Rhod Gilbert and Greg Davies won't be laughing too much as they dodge reckless drivers, floods and landslides on an ambitious drive through mountainous Nepal. [S]
Alaska: And you thought the M25 was bad. Sue Perkins and Charley Boorman trek across Alaska on the notorious Dalton Highway, battling Arctic conditions on a glorified dirt track. [S]