Kevin and Grant outfit cars with armour and weapons and face off in a demolition derby. Later, they build a lie detector and a chainsaw-powered chairlift. Jakso 4 Kausi 1 Vuosi 2015

Can Kevin and Grant build an amphibious motorcycle that drives on the water? In an ultra-scientific mini-golf competition, who can make the most holes-in-one? Jakso 5 Kausi 1 Vuosi 2015

The guys turn chariots into speed demons by replacing horses with powerful motorcycles. Kevin and Grant find out what it takes to escape from Alcatraz. Jakso 6 Kausi 1 Vuosi 2015

Kevin and Grant build a submarine and see if they can survive at the bottom of a pool, supersize wind-up cars, and see if duct tape can stop a bullet. Jakso 7 Kausi 1 Vuosi 2015

Kevin and Grant build supersized Rock 'Em Sock 'Em Robots, build a motorcycle with one wheel, and what it takes to survive the perfect storm. Jakso 8 Kausi 1 Vuosi 2015

A balloon-powered sleigh is built to deliver presents, snow is made and covers Kevin's front lawn and holiday decorations are deployed in record time. Jakso 9 Kausi 1 Vuosi 2015