Jaguar takes centre stage as Jeremy Clarkson explores the marque's past, present and future. He drives the Aston Martin DB7 GT and Jaguar XKR-R, while the striking Jaguar R-Coupé concept offers a glimpse of what may lie ahead. James May gets behind the wheel of the legendary Jaguar C-Type, and the team investigates a vital question: just how far can you drive in a Jaguar XJR before boredom sets in? Elsewhere, A.A. Gill makes the case for the London taxi as the greatest car ever made, and Boris Johnson attempts to survive a lap in the reasonably priced car.