Season 1

In the spring of 1976, the motocross world changed forever. At a dusty track in Northern California, a polished champion named Marty Smith met his match in an unknown Yamaha rider with a firestorm riding style — Bob “The Hurr...

Some Kind of Science: Part 1 plunges into the fiercest rivalry motocross has ever seen. Marty Smith—Honda’s polished California icon—was the face of the sport. Bob Hannah—Yamaha’s sand-slinging wild card—was its rebellion. In...