S18, E2: Jeremy Clarkson and James May travel to Beijing for a look at China's ever-expanding car industry and a violent encounter with The Stig's Chinese cousin. Meanwhile, Richard Hammond is in Texas to immerse himself in the surprisingly interesting world of NASCAR racing. Plus, the Mercedes SLS Roadster makes an enormous amount of noise and smoke on the test track, and Matt Le Blanc is the star in the Reasonably Priced Car.