Actor-presenter-comedian Angus Deayton manages to stay spotless except for one incident, unlike his BBC acquaintance, journalist Mariella Frostrup, while they travel from Madagascar's East coast to the north eastern pristine forest at the end of the rain season. The mud transforms the poor roads into slippery slopes, many of the numerous bridges are out of order, the pauper population can supply little more then experience and tenacity.
Crossing the former Soviet republic of Georgia from Azerbeidjan trough capital Tiblisi, then to legendary Svanetia and the Black Sea, actor Hugh Bonneville and comedian Jessica Hynes admire the varied landscapes and mostly isolated town in idyllic valleys and daunting Caucasian mountains. They wonder if roads, however practical for the locals, and touristic infrastructure built all over the place, despite political near-encirclement by hostile neighbors, may spell the end of pristine culture and traditions.
Marcus Brigstoke and Phil Jupitus cross Bolivia, where poorly maintained roads are a major death cause, starting from the Andes Highland. Trough plain with lakes where salt is extracted, they continue to the world's greatest silver mines in Potosi.