Linda, Donnie and Murray are back where they belong, in the driving seat. They're test driving the newest cars on the market, taking part in car club rallies and thrashing old bangers round Scotland. Air an Rathad is back with a new look and a brand new series! Donnie travels north to Sweden for a masterclass in ice driving. Former rally champion Mikaela Kottulinsky shows the boy from Ness how it's done. Linda learns about an old classic, the Vauxhall Viva, and shares her opinion of the new Viva on the market. Will it prove as popular as the original? Murray teams up with Fiona Mackenzie at Thainstone Car Mart to buy a banger that's reliable enough to beat Linda and Donnie in a new challenge - Ralaidh na Trealaich. They're delighted with their purchase of a Golf GTi - but hold on, there's a twist...

Air an Rathad goes all electric in this episode, test driving cars from both ends of the market - the Nissan Leaf and the new Tesla Model S. But who gets to drive what? The Tesla Model S has a range of 250 miles and does 0 to 60 in 3.1 seconds. Both Donnie and Murray are desperate to drive it, so Linda decides to toss a coin... The Leaf is the UK's top-selling electric vehicle, but with a range of under 100 miles, it's a city car. Air an Rathad tests its commuting capabilities. And without satnav or mobile phones to assist them, both teams get hopelessly lost in Railidh na Trealaich. They're trying to get to Grampian Transport Museum in Alford, where a vintage vehicle is waiting for them on the track.