North Magnetic Pole
Later that summer, on 25 July, the BBC aired a special edition episode entitled "". It was one of the first episodes of the programme to be shown in high-definition, and the third special to be produced, focusing on a race to the North Magnetic Pole, at its recorded location in 1996, between a "polar modified" Toyota Hilux and a dog sled. Considerable planning and co-ordination for the filming of the episode was conducted by both "Top Gear"s production team and Toyota, with both Clarkson and May, driving the Hilux, being the first people to reach the recorded location of the North Magnetic Pole by car. It was one of a number of challenges in which the presenters had to be focused and serious, despite the comedic scenes shown, with another being on 9 September, when the presenters, including The Stig, participated in the 2007 Britcar 24-hour race at Silverstone, using a race-prepared, second-hand diesel BMW 330d, fuelled by biodiesel refined from crops they had sown as part of an earlier feature.