Alex Debogorski is hauling groceries to an isolated community in Canada when he hits a stretch of road flooded after a river burst its banks and there is no telling exactly how deep the water is, nor whether his rig can make it across. In Prudhoe Bay, Alaska, Tony Molesky is not convinced that Dave Redmon's driving skills are good enough to go solo after he completes his debut training run. In Fairbanks, Maya Sieber gets her first taste of the dangers of the haul road, while Lisa Kelly helps out a fellow driver whose truck has spun into a ditch