Survivors recount the terrifying first 24-hours of the worst nuclear accident in history. After a reactor explodes during a safety test at a power plant in Ukraine, firefighters rush to the scene, una…

Two days after the explosion, the world wakes up to a terrifying global disaster. At the power plant, helicopter pilots try to put out a fire in the reactor core, braving plumes of highly radioactive …

Workers begin to clean-up the deadly radioactive fallout from the explosion. After troops establish an exclusion zone, Gorbachev orders the construction of a vast concrete sarcophagus to cover the des…

14 months after the disaster, plant operators face a Soviet show trial. At the reactor, scientists hunt for the deadly remains of the radioactive fuel. As the USSR crumbles, an independent investigati…