Jeremy Clarkson and James May are set the task of creating a memorable car advert. The boys quickly fall out on set as James tries to fill every second of airtime with immensely complicated information about fuel economy, whilst Jeremy just wants everything to explode. Meanwhile, out on the track, Richard Hammond ends up going mostly sideways in the new Vauxhall VXR8 Bathurst. The Cool Wall returns after a long absence, and American chat show legend Jay Leno is the Star in a Reasonably Priced Car.