S1, E4: In the late 1800s Americans rarely bathed, lived in filthy conditions and deadly diseases were commonplace. But James Gamble and Harley Procter invent a revolutionary new soap that revolutionizes America and opens up a market to entrepreneurs including King Gillette and Jacob Schick whose bitter rivalry will birth the shaving industry as we know it, spawning a new billion-dollar industry and changing Americans daily lives forever.