James visits California to learn about the hydrogen-fuelled Honda Clarity, and Jeremy assesses the performance of Tesla's battery-powered supercar the Roadster. Richard looks back over 50 years of British touring car racing, and singer Tom Jones is the Star in a Reasonably Priced Car.
Elenco: Jeremy Clarkson , Richard Hammond , James May , Ben Collins , Chris Harris , Paddy McGuinness , Andrew Flintoff , Sabine Schmitz , Matt LeBlanc , Rory Reid , Perry McCarthy , Eddie Jordan , Jason Dawe , Chris Evans .