Tasmania to London. One end of the globe to the other. 800 hitchhiking rides. 18 thousand miles. Four seasons. Three continents. 19 countries. How many rides does it take to hitch from Tasmania to London? Rogue wanderer Jamie Maslin decides to find out, propelling him into a high stakes adventure of a lifetime that sees him tackle searing desert, freezing mountains, tropical jungle and barren steppes on little more than a thumb and a prayer.