S4·E18 Mongolian Wheels

Jett and Donnie deliver four huge, high-tread tires to Gaspard and his dad in the Gobi Desert in Mongolia. The two need the desert burrowers, as Gaspard calls them, to cross the desert on their trip around the world with their motorhome Enjo. But Enjo loses control and stirs up so much sand that the nomad Nambayar's flock of sheep runs away. Together they herd the escaped animals back.