Top Gear is a British motoring show which began in 1977. Over time, and especially since a relaunch in 2002, it has developed a quirky, humorous and sometimes controversial style. It is also the most watched factual TV show in the world.
Since 2006, a number of specials have been produced in which the presenters race against each other through foreign countries, typically with a cheap vehicle. Regular episodes feature reviews, challenges, news and a 'Star in a Reasonably Priced Car' in which a celebrity does a timed lap around the Top Gear track.
From Top Gear on Wikipedia.