Watch Top Gear Season 8 Episode 3 Online

Britain's best-selling car, the Cortina, is replaced by the Ford Sierra. Frank Page traces the story behind the launch of this new multi-million pound model. Sue Baker visits Dunlop's new facility at the Motor Industry Research Association's track, which enables motorcycle tyres to undergo more stringent safety tests. Bob Friend reports on a new computerised navigation system aimed at easing Tokyo's traffic problems.