

Featuring revealing interviews with survivors speaking publicly for the first time, alongside rare insight into the CIA and Soviet responses, this series exposes a web of secrecy, miscalculation, and human cost. Astonishing new footage from inside the nuclear exclusion zone reveals how this scarred landscape is once again under siege as war encroaches on one of the most dangerous places on Earth.

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, unaware of the lethal levels of radiation. Soviet authorities try to cover up the disaster as a cloud of radiation begins to circle the world.
Aired: 4/19/2026
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 smoke. Soviet authorities eventually begin to evacuate 50,000 people from the local area, while still trying to conceal the scale of the accident.
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