What happens when scientists push too far? From nuclear disasters to mind control experiments, this episode dives into the most dangerous, reckless, and horrifying scientific tests ever conducted. Did the U.S. government let people die just to study disease? Did scientists almost ignite the Earth's atmosphere with a nuclear bomb? And why did researchers play hot potato with an unstable plutonium core—twice? Some of these experiments changed the world; others ended in catastrophe. Either way, none of them should have happened.