I'd like to meet the person who thought of putting Sue Perkins and Liza Tarbuck in a car on one of the most dangerous roads in the world. Broadcasters Perkins and Tarbuck drive along the legendary Ho Chi Minh Trail, a network of roads and paths in Southeast Asia that was littered with unexploded bombs following the Vietnam War. Their journey takes them through jungles and mountains to some of the least-explored corners of Laos and Vietnam, and proves to be a gruelling test of their bravery, motoring skills and senses of humour.