David Morrissey as Self - Narrator (voice)

Igor Slavinskiy as Anatoli Diatlov

Aleksander Khoroshko as Alexander Akimov

Volodya Stepanenko as Leonid Toptunov

Aleksander Klimbutski as Boris Stolyarchuk

Volodymyr Holosniak as Valeri Perevozchenko

Vladimir Mamchur as Alexander 'Sasha' Yuvchenko

Irina Pavliuk as Natasha Yuvchenko

Nikita Chavinin as Kirill Yuvchenko

Vladimir Melnyk as Valeri Khodemechuk

Vladimir Velianik as Yuri Tregub

Denys Hranchak as Sasha Agulov

Vladimir Ilenko as Nicolai Fornin

Nikolai Steinberg as Self - Nuclear Physicist

Boris Stolyarchuk as Self - Chernobyl Survivor

Alexander Yuvchenko as Self - Chernobyl Survivor

Piers Paul Read as Self - Writer

Sergei Yankovsky as Self - Chernobyl Investigator

Anatoli Diatlov as Self (archive footage)

Mikhail Gorbachev as Self (archive footage)