David Morrissey

Himself - Narrator (voice)

Igor Slavinskiy

Anatoli Diatlov

Aleksander Khoroshko

Alexander Akimov

Volodya Stepanenko

Leonid Toptunov

Aleksander Klimbutski

Boris Stolyarchuk

Volodymyr Holosniak

Valeri Perevozchenko

Vladimir Mamchur

Alexander 'Sasha' Yuvchenko

Irina Pavliuk

Natasha Yuvchenko

Nikita Chavinin

Kirill Yuvchenko

Vladimir Melnyk

Valeri Khodemechuk

Vladimir Velianik

Yuri Tregub

Denys Hranchak

Sasha Agulov

Vladimir Ilenko

Nicolai Fornin

Nikolai Steinberg

Himself - Nuclear Physicist

Boris Stolyarchuk

Himself - Chernobyl Survivor

Alexander Yuvchenko

Himself - Chernobyl Survivor

Piers Paul Read

Himself - Writer

Sergei Yankovsky

Himself - Chernobyl Investigator

Anatoli Diatlov

Himself (archive footage)

Mikhail Gorbachev

Himself (archive footage)