Petrolhead Mairi Ross wants to be a rally driver, but first she has to pass the BARS test. She travels from Lewis to Knockhill in Fife to try her luck. Examiner Bob spots a few driving errors and shares some tips. Is it enough for Mairi to pass? Murray is behind the wheel of the new Jeep Renegade. He likes his cars big and beefy, and the Renegade fits the bill. And the Rally has made it to the heart of the Highlands. The scenery is lovely, but the teams are too busy to notice as they race to win this show's challenge. What will they put their wrecks through this time?