On Top Gear Australia this week, Warren and Steve investigate the 'Toorak Tractor' phenomenon by taking a tractor down the streets of Toorak. Charlie takes the Audi R8 for a test on the Hamilton Island runway to test it's claim to be a 'practical supercar'. Steve also looks at the BMW 135 Coupé. The boys then take on the ultimate challenge when they attempt to build an amphibious car from an Audi. Shannon Noll is the "Celebrity in a Bog Standard Car".