Jeremy attempts to build a car that's even smaller than the famous Peel P50. He then tests it out on the streets of London before putting his concept to the ultimate test of credibility in the fearsome Dragons'Den.

Meanwhile, James tests the latest Bentley Continental GT Speed by taking it on a rally stage and Richard is at the test track to unleash the sensational Pagani Huayra hypercar before handing it over to the Stig for the lap of its lifetime. Homeland star Damian Lewis is the star in the Reasonably Priced Car.