It's the Air an Rathad Energy Special this week, as Murray drives one of the very first commercial hydrogen fuelled cars in the UK - a Hyundai IX35. How does it compare to other renewable fuelled cars on the market? The Arnold family put the all electric Vauxhall Ampera to the test - it's won 2012 Car of the Year, but is it to their liking? Wacky Races also goes green as the team try to catch the wind, and Cudig's classic reminds us of the old days when petrol was 16p a litre - and the Ford Cortina was the car to be seen in!

Old friend 'Rollover Roy' is competing in the Speyside Rally with a new car and a new navigator - can they keep the car upright this time? Fiona enjoys taking a furry friend for a spin in the new Mini Roadster, uber cool but a tad chilly for the Scottish climate! Cudig's final classic of the series is the Landrover, a reliable workhorse loved my millions; and it's a thrilling end to Wacky Races - if you think it's a done deal, think again!