Jeremy wonders why there aren't more three-wheeled cars and investigates further with a closer look at the Reliant Robin. James drives the Toyota Hilux pickup up an active volcano in Iceland; and The Stig rips up the track in the new Bentley Continental Supersports.

With a budget of £5,000 each, the boys buy cars which are at home on the track and suitable to do the family shopping. James tests the Porsche 911 Sport Classic and the Boxster Spyder. Alistair Campbell is the Star in a Reasonably Priced Car.

Jeremy, James and Richard drive the Aston Martin Rapide, Porsche Panamera Turbo and the Maserati Quattroporte; four-seater cars from manufacturers more famous for their two-door cars. Richard drives the Chevrolet Camaro SS and Mercedes E63 AMG. F1 driver Rubens Barrichello tries his luck in the Reasonably Priced Car and Rupert Grint is the Star in a Reasonably Priced Car.

The team attempt to build some interesting motor homes before setting off for a Bank Holiday weekend in the West Country to see how what that they have created holds up. Jeremy test drives the new Audi R8 V10 Spyder and the latest version of Porsche's enduring 911 Turbo cabriolet to see how they compare.

Richard takes the Volkswagen Touareg 4x4 to Sweden for a race against some snowmobilers. James travels to Germany where he attempts to break his personal speed record in a brand-new version of the Bugatti Veyron. Jeremy Clarkson looks at the reasons why Ayrton Senna is considered the best driver of his generation.