Lisa Kelly and G.W. take on the same road that almost sent G.W. over the edge the day before, but now, with Lisa behind the wheel and a heavier load, the same mountain's rigged with demolition dynamite and ready to explode. Hugh gets his old truck back and hauls a load of sheep through the dark Peruvian night, where sharp switchbacks and cliffs come out of nowhere. A rough day for Tino means partner Tim is forced to drive and maneuver on his own, and Tim learns how quickly he can go from "hero" to "zero."