Jeremy Clarkson heads to Italy to get behind the wheel of the exclusive, hand-crafted Touring Superleggera Disco Volante, which is based on the already rare Alfa Romeo 8C Competizione sports car. Richard Hammond asserts authority over the sand dunes of Abu Dhabi in the six-wheel-drive Mercedes-Benz G63 AMG 6x6. James May defies his status as Captain Slow by blasting two Caterhams around the test track - the minimalist entry-level Seven 160 and the full-fat supercharged Seven 620R. Comedian Jack Whitehall sets a lap time in the Reasonably Priced Car.