Jeremy James and Richard take three cars to Spain: the new BMW M3, Mercedes C63 AMG and Audi RS4. James drives the new Jaguar XF; Richard looks at beach buggies and Jeremy turns a G-Wiz into a radio-controlled car. David Tennant is the Star in a Reasonably Priced Car.

Matt LeBlanc and Chris Harris embark on an all-season US road trip in the latest convertible supercars from Lamborghini and Porsche, journeying from broiling desert to snowy mountain. Back at the test track, Rory Reid sets the toughest of driving challenges for Chris and the Alfa Romeo Giulia, while actor David Tennant takes a spin in the new Reasonably Fast Car.