A list of every car reviewed on Top Gear Series 4, with photos! Featuring Jeremy Clarkson, James May, and Richard Hammond, Top Gear has an estimated 350 million viewers world wide, making it arguably the highest rated show in the world. It is also one of the most pirated television series on the internet with each episode being downloaded approximately 300,000 times after airing. But what is Top Gear? It's a car show. Originally started in 1977, the show relaunched in 2002 with a new format that saw its ratings surge. With its various reviews, challenges, and races, the show is still going strong after almost 20 seasons since its relaunch.