In the final part of Henry Cole's 2,500 mile ride along Route 66, Henry finds the best might have been saved for last as he is passes through New Mexico, Arizona, California and onto journey's end in Los Angeles. Henry heads out of Gallup, New Mexico in 120 degree heat but no-one has told him it's also monsoon season in the deserts in late July. Will Route 66 still rate as one of the greatest rides on earth or is its magical allure slowly becoming a thing of the past?