Terry's battle of wits includes a mission to stack 100 lbs. on an egg without cracking, and an obstacle course for your memory.

Guy's battle of wits incules a helium-fueled race where it pays to be the slowest across the finish line, and a super-sized packing challenge.

Terry and Guy battle the elements in Randy's big word challenge; then they put their engineering skills in a bridge build-off.

The geniuses attempt to decode Guy's gauntlet of pattern puzzles.

The guys go head to head in a mastermind density challenge, and they have to build a self-propelling boat using simple materials.

Guy deploys a secret weapon in a paper airplane engineering challenge.