Jeremy Clarkson investigates the car bargain of the year and tests two supercars - the Lamborghini Murcielago and the Pagani Zonda. Richard tries to beat a speed camera, Jason reveals the worst tricks used by car dealers, and guest Harry Enfield takes a trip round the Top Gear test track as the Star in a Reasonably Priced Car

Jeremy, Richard and James are challenged to drive from the heart of Switzerland to the north-western coast of England on just one tank of fuel, with the winner switching on the Blackpool illuminations. James also power tests the Pagani Zonda F Roadster, and the Stig sets a lap time in the Bugatti Veyron. Grand Designs presenter Harry Enfield is the Star in a Reasonably Priced Car.