We LOVE a good Top Gear special so tonight's episode is right up our alley. We've seen them high-tail it through America's bible belt, and navigate the waters of south-east Asia but tonight Richard, Jeremy and James are off on a great big African adventure. In the first of a two-part special, the boys set out to find the definitive source of the Nile. We're sure it won't be easy, considering they only have three old estate cars to get them there. We can't wait to see what the lads get up to along the way.