The show reviews ancient Roman navy SEAL techniques of capturing enemy ships from underwater and replicates the feat. The tactics of ancient Roman war dog units are explored including a historically savage breed of dog, the Mastiff. Finally, the secrets of the samurai sword and how it was made is reviewed and they build and test an ancient Horro, a Japanese device that could protect a galloping cavalryman from arrow fire using thin silk.

This episode explores some ancient world records that still stand today. The most valuable thing in the ancient world is still the most valuable thing today at 2000 dollars per gram. A replica of a 2000 year old jet engine is built and a weapons team finally reveals the only weapon in history that can shoot around corners. They review what was the fastest thing in the ancient world and explosives experts reveal that the first gun was made of fruit.