Cold Fusion-God's Free, Un-weaponisable Energy

Nigel Hands: One very clever man's battle with the corrupt Crown of England and the Royal Navy, his understanding of magnetism, light and energy threatened [Their] monopoly on Power & Energy across the whole earth, it cost him his child but he persevered to release the information.

Even though he begins with enough nerd food to fry your noodle, he brings it all together in the end and makes the revelation of zero point free energy understandable for everyone.
This one will make you excited at first to realise that free energy is possible, then furious that it has been kept for near 40 years, for no other reason other than greed and power.