The team takes a shot at constructing one of da Vinci's most futuristic designs: the armored tank. This machine, envisioned by Leonardo in the 15th Century, could rival modern-day inventions. But will it work?

The crew attempts to build the renaissance master's most massive design: a towering three-story siege ladder. But as creative differences arise, tension threatens to pull the team apart.

The danger level hits a new high when the team devotes their talent to recreating Leonardo's deadly bladed chariot. But instead of horsepower, the team updates Da Vinci's 15th century design with robot power.

The guys take a shot at building a multi-cannon machine gun. The team is on high alert throughout the build as they work with hazardous black powder, an unstable substance that could detonate all on its own.

Bill and Flash go against Val and Jurgen to see who can build a better self-propelled cart.

The crew tries to re-create a giant catapult but discovers building the bow that powers the device is more complicated than expected

The team attempts to build the Air Screw, DaVinci's dream helicopter like device.

The team builds Leonardo's Crossbow Machine a massive structure designed to automatically load four large crossbows.

The team takes on the most deviously complex war machine.