Watch Scrapheap Challenge online: Episode 5 Polar Pinball

The challenge In this week's chilling challenge, the teams have to build an omni-directional machine that will act as a pinball in our polar arena. By notching up points for precision prangs on our high scoring targets, the team that scores the most wins! Lumbering Jacks Tree-cuttin' captain Baden and his fellow fellers Andrew and David are a top Scrapheap team. They 'say it how it is', love their agricultural machinery and are keen off-roaders. A jolly team with a good rapport, a sense of humour and a great attitude. With the motto 'If it's been built before, it can be built again', this team have the potential to go far. Our forest-loving, axe-wielding men of South Wales are here to cut their opponents down to size. Their team expert is a development engineer and former motorbike racer from Staines. Do-it-all Duncan Hyde is also an enthusiastic member of the Hovercraft Club of Great Britain. Over the last 10 years he has made no less than five hovercrafts, which his son has raced nationally and internationally. The Powerlifters Neil, Mark and Dave are true Scrapheap! These boys love their drag racing and hot rodding and are all forklift maintenance engineers in Essex. Bald, tattooed and pierced, Neil and Dave provide the main double act but gentle giant Mark doesn't seem to mind playing the fall guy to the duo. Energetic and with a range of outside interests, The Powerlifters are hardworking, straight talking, great fun, and claim to be able to take on anything Scrapheap can throw at them! The Powerlifters' team expert is Colin Spooner, a design engineer from Norfolk who spent many years working for Lotus as design director. He now runs his own company, developing innovations in automotive design and engineering. The judge Graham Drury is the man that single-handedly invented and developed the adrenaline sport of ice speedway. He's spent years doing weird things on ice, including racing bobsleighs and wowing the crowds with spectacular ice-motorbike stunts, blindfolded! He now manages and promotes Workington Comets speedway team and in his spare time he's a magistrate. That'll be why he's nicknamed The Judge then!

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