Benjamin Franklin was the most famous American in the world by the time of the Revolutionary War, known as a writer, inventor and philosopher. But as an old man, he would earn another title -- rebel.

By the time of the Boston Massacre, Dr. Franklin was already an elderly man, watching the early days of American unrest from his comfy home in London. His scientific experiments were eventually put on hold as he rushed back to the colonies to help set up the mechanism of independence.

But while others went to war, Franklin went -- to France? It was because of his great celebrity that he was deployed on an unusual mission to court an important ally for George Washington and his Continental Army. And it was in the banquet halls and libraries of Paris that Franklin would actually invent one of his useful creations.

STARRING: Mesmer, Marie Antoinette, Voltaire and all the Founding Fathers!

Part Three of The Invention of Benjamin Franklin. Check the two prior episodes to catch up on his extraordinary story.