On the Line - The Race of Champions documentary celebrates the 30th birthday of the Race Of Champions, from its off-road beginnings on Gran Canaria to its popular stadium events in some of the most iconic venues around the world. For over 30 years the Race Of Champions has brought together the world's greatest drivers from Formula 1, Rally, NASCAR, IndyCar, Le Mans, and more to answer one simple question: If you let them loose in equal cars, who's actually the fastest of them all?

• Documentary