Siberia: Comedic chums Ed Byrne and Andy Parsons brave freezing temperatures as they drive across Siberia's infamous Road of Bones, encountering icy tracks and deserted gulags. [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]
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]