The teams embark on a ten-hour build of two completely different vehicles. One team builds a hot rod with a big, heavy engine and the other designs a car with a light body and less powerful engine. George and Cathy get in on the shoptalk to see why the teams went the way they did and interview expert and competition judge Pat Foster, a veteran drag racer. The next day, the teams have three chances to see who can get the best possible time.

Challenge to build a machine chunk a pumpkin the most accurately to hit a target. They must use human power only. Contestants Team Blue: The Young Guns Team captain Stan Brighton Jeus Beltran Brian Michem Expert Ron Toms Team Orange: Three Rusty Juveniles Team captain Jay Ray Tom Expert Waddy Thompson

Challenge to build a machine to carry each member on one lap around a off road course that has bumps, jumps, and water. Contestants Team Orange: Damage Team captain Ristow John Kalbot Expert James Aduskevich Team Green: The Long Brothers Team captain Brian Long Terry Long Gary Long Expert Mike Ferguson

Challenge to build a machine that can race to an island to save all their team mates one at a time. Contestants Team Blue: Art Attacks Team captain Ken June Wayne Expert Justin Manley Team Purple: The Metal Medics Team captain Dr. Bill Alex Bob Expert Larry DeCamm

Challenge to build to open locked treasure boxes 20 feet underwater. They have to send down an aquanaut in a diver suit and pump air to his helmet. Contestants Team Green: Art Attacks Team captain Ken June Wayne Expert Greg Brian Team Blue: The Young Guns Team captain Stan Brighton Jeus Beltran Brian Michem Expert Bob Kirby

Challenge to build a hovercraft that is the fastest in a relay race. Each member must take a turn driving the hovercraft around the course. Each team choose a different way to build. One goes for heavy using two engines the other team goes for light weight using only one engine. Contestants Team Yellow: The Texas Scrap Daddies Team captain Ken Mark Sean Expert Terry Chapman Team Green: The Long Brothers Team captain Brian Long Terry Long Gary Long Expert Bob Wind

Challenge to build a that will not only attain the greatest height but will also bring a payload an ostrich egg back to earth without damage. Contestants Team Green The Long Brothers Team captain Brian Long Terry Long Gary Long Expert Bruce Lee Team Turquoise Art Attacks Team captain Ken June Wayne Expert James Tucci