Featured: halogen bulbs; cellulose insulation; aluminum ladders; bamboo fly rods.

A freak heat wave hits the MGM camp, opening deadly cracks in the ice road just as they are about to move their rig to the second well; Nabors' rig is finally drilling steadily when they hit a pocket of tough chert three kilometres down.

Nominated drivers brutally weave their way to the Driver Rehabilitation Centre at Canadian Forces Base Borden, 100 kilometres north of Toronto; the eight drivers tackle a precision steering course that ends up in crashes, heated arguments and tears.

Frustrated by Jamie's artistic eccentricities, Dave steps back to let his brother lead the latest build: turning a military truck and a combine into an all-in-one corn picking and cooking machine, but Jamie may crack under the pressure of being in charge.

Adam and Jamie get on the trail of some flammable Hollywood fables while Kari, Grant and Tori break out the defibrillator for some electrifying action.