Parenthood star Dax Shepard first caught Marc’s attention as the barely functional simpleton named Frito in Idiocracy. And while he’s had an expansive acting career, starting at Punk’d and leading up to his latest movie This Is Where I Leave You, Dax’s life has been defined by his family, his sobriety and his cars. Lots of cars. And lots of racing in those cars. This episode is sponsored by FanDuel and Stamps.com.