Episode 4

This series of the world's biggest motoring show continues as Chris Evans, Matt LeBlanc and Sabine Schmitz buy cheap second-hand cars and head for Venice. The aim? To prove road travel can be more luxurious than taking the train.Elsewhere, Rory Reid heads to New York to sample the all-electric Tesla Model X, while Chris Harris dons his race helmet to drive the most powerful Aston Martin of all time - the fearsome Vulcan. Bear Grylls and Brian Cox are this week's Stars in a Rally Cross Car.