Tim and Michael investigate the hidden innovations on the Traub motorcycle, the Brubaker Box and the Tucker 48 -- commercial failures, but brilliantly-engineered machines with technology years ahead of their time.

A fan service episode pits Porsche engineering against Ferrari engineering through the lens of Le Mans. How did two completely different approaches to car design result in strings of wins and losses at Le Mans? Who did it better, Porsche or Ferrari?