The guys return to Geoff's adopted home state of Arizona, gunning their go-anywhere meteorite hunting machine "The Mule" down historic Route 66 and give themselves a nearly impossible challenge: Can they find meteorites in two different strewnfields in one state on a single expedition? Steve and Geoff kick it old school and search primarily by eye while hiking into some of the roughest terrain in the Southwest. All at 107 degrees F! Also: Steve uses a freight train as a sunshade, Geoff makes friends with some ants, and fellow hunters Sonny Clary, Suzanne Morrison, and Nate Ditto join the team.