This week, two teams of four highly skilled engineers are given the implausible task of transforming two concrete mixer lorries into boats. The vessels they create need to be capable of carrying a half-tonne cargo on a figure-of-eight course around a lake. They must also build a winch system to hoist their cargo off the boat and carry it across a finish line. All in just four days! Motor Morphers’ HQ is manned by Mark and Hadrian, who have some heavy machines for cutting, drilling and hammering. Hadrian’s response to Jason’s suggestion about how the teams should proceed is, “If they turned that into a human-powered paddle steamer, they would most definitely be bonkers!” But the teams have other ideas – the Reds plan to attach some outriggers behind a hollowed-out cement drum, while the Blues, led by Ed ‘The Professor’, want to create an impeller-driven craft, a bit like a jet ski.