Heavy vs. light is the theme of a build-off that pits electronics experts against set carpenters in the debut of the series in which two teams compete to build elaborate, chain-reaction-producing contraptions.

Rocket scientists and special-effects artists compete to build a fire-and-ice-themed contraption.

Engineers compete with artists to make a speed-themed machine.

A team of engineers goes up against a group of artists in this flight-themed build. Will their machines get off of the ground? Or crash and burn?

Designers and construction workers square off to build the most impressive multi-step tool-themed machines, but tensions rise amongst both groups and one team finds itself at odds with its machine.

Rick Baker is the guest judge as Team InSaign (metal workers) and Team Fail Fail Fail Win (multi-media artists) fight for best machine.