This concluding episode reveals the huge sacrifice made by thousands to contain this devastating nuclear disaster. Contributors include those who risked persistent deadly radioactive levels to clean up the site.

With the reactor on fire and radiation spewing out into the atmosphere, firefighters battle to bring the blaze under control. A former Soviet helicopter pilot reveals what it was like flying over the core, while a historian who grew up in neighbouring Belarus reveals how her mother pulled her out of school and kept her inside when her father - a nuclear scientist - heard rumours of an explosion.

The events that led up to the nuclear disaster in 1986, hearing from those who were caught up in the tragedy, and those who risked their lives cleaning up afterwards. The series also details events in 2022, when Russian forces took over Chernobyl during its war against Ukraine, and the plant was once again set on a potentially catastrophic course.