The first of our two-part special in which Clarkson, Hammond and May are challenged to build a bridge over the River Kwai in Thailand. In order to do that, however, they have to drive across Burma, a country that has been largely closed to Westerners for more than 40 years, and must make the trip in three lorries, each bought sight unseen from the internet on a limited budget. What follows is an epic journey of beautiful scenery, regular adversity, ongoing malfunction and the constant bickering of the three old men…