Kaley Cuoco introduces an epic new challenge. Two teams compete in a road trip across the USA where the lowest CO2 emissions wins. Meet the teams, see the wonders of the west coast, and discover new and cleaner forms of transport on the road from LA to Vegas baby!
Travel Hackers Sara Dietschy and John Hill experience some troublesome terrain in the wilds of Utah, while intrepid duo Damon and Jo enlist some real horsepower on the trail to Telluride.
On the penultimate leg, Team Alpha and Team Omega must get their hands dirty as they cross four states of the Midwest - all while driving some lean, mean, hard-working - cleaner emitting - machines.
With the finish line in sight and almost 3,000 miles covered, both teams are playing for the ultimate prize, but who will triumph in Kaley's final challenge?
