On August 6, 1890, a prisoner named William Kemmler became the first man executed in the electric chair. It was designed to be a more humane form of execution, but the gruesome scene in the death chamber that day revealed the device to be anything but. 

Behind the story of the electric chair lies another story, involving three titans of innovation—Thomas Edison, Nikola Tesla and George Westinghouse — locked in a desperate fight for control of the future of electricity. Their conflict would take lives, spark scientific advances and revolutionize human existence.

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