James May, Kate Humble and Ant Anstead are back at one of the biggest and busiest car factories in Britain. Think you knew how a car was born? Think again. Tonight James races against the clock on the production line and embraces the Japanese philosophy of Kaizen. Kate gets to the bottom of how manufacturers test car seats for mass production and Ant heads to Germany to put his faith in a driverless car on the autobahn. Inside the factory the team reveal what it takes to build a thousand different cars a day, and are live as a car that started being built yesterday drives off the production line for the very first time.