In this episode, each team has to build a drilling machine. Then, the vehicles will be tested in a competition which consists in digging a hole big enough through 3 concrete walls to get all the team and the machine in it. Contestants: "Turbines" vs. "Bold Three"

Challenge : build a hill-climbing car capable of carrying a team member as far as possible up a 400 ft., 40 degree gradient hill. Each team gets 3 attempts at conquering the steep gradient. Contestants Team Yellow : The Pit Crew Team captain Frank, Scott, Tim, Expert Chris Adamson Team Blue : The Jet Jocks Team captain Ron, Dave, Gifford, Expert Randy Ellis

Challenge : build a land-racing yacht. Contestants Team Green : The Quantum Mechanics Team captain Leila Hasan, Danielle Smith, Kimberly Hamad-Schifferli, Expert Nord Embroden Team Red : The Geeks Team captain Thomas Massie, Rhett Creighton, Rony 'Koobs' Kubat, Expert Dennis Bassano

In this episode, each team has to build a machine that's able to pick up the garbage from the streets. Then, the machines will be tested in a competition which consists of picking up the garbage off the street. The team that collects more garbage (by weight) wins. Contestants 'Sewer Rats' vs. 'Trash Can Heroes'

In this semi-final competition, the teams have to build hydrofoils in a straight-up time trial. Contestants 'Sewer Rats' vs. 'Turbines'

In this episode, each team has to build a boat which has to be able to extinguish small fires. Then, the vehicles will be tested in a competition which consists in extinguishing a fire from a house across a lake. Contestants: "Pit Crew" vs. "Geeks".

In this episode, each team has to build a powerful and fast remote controlled car. Then, the vehicles will be tested in a competition which consists in a giant battle bot fight. The teams can win by knocking out the enemy or earning points. Contestants "Pit Crew" vs. "Turbines".