James Martin continues his American Adventure with a high-octane pit stop at the world-famous Sonoma Raceway. Nestled in amongst Sonoma's vineyards, James finds out about preparations for an IndyCar season finale and gets driven around the track by Mario Andretti, one of the undoubted kings of American motorsport. James cooks trackside before visiting a new foodie Sonoma hotspot simply called Shed; after a wholesome lunch, James gets invited to Mario's nearby vineyard for wine and a chinwag.