The truckers drive up to a height of 13,000ft in the Himalayas, higher than they have before, as they tackle the Rohtang Pass for the first time. Rick Yemm transports a sacred Buddha statue between monasteries, while Lisa Kelly brings vital supplies to a city normally cut off by snow. With the ice melting and the roads vanishing beneath rivers and gushing waterfalls, they then face their most treacherous route yet