Valery Legasov

Jared Harris

Blond Man

Michael Shaeffer

Boris Shcherbina

Stellan Skarsgard

Ulana Khomyuk

Emily Watson

Lyudmilla Ignatenko

Jessie Buckley

Anatoly Dyatlov

Paul Ritter

Vasily Ignatenko

Adam Nagaitis

Nikolai Fomin

Adrian Rawlins

Alexandr Akimov

Sam Troughton

Kirschenbaum

Joshua Leese

Viktor Bryukhanov

Con O'Neill

Leonid Toptunov

Robert Emms

General Tarakanov

Ralph Ineson

Brazhnik

Adam Lundgren

General Pikalov

Mark Lewis Jones

Viktor Proskuryakov

Karl Davies

Aleksandr Kudryavtsev

Paulius Markevicius

Mikhail Gorbachev

David Dencik

KGB Chairman Charkov

Alan Williams

Boris Stolyarchuk

Billy Postlethwaite

Nikolai Gorbachenko

Ross Armstrong

Yuvchenko

Douggie McMeekin

Viktor Degtaryenko

Karolis Kasperavicius

Pavel

Barry Keoghan

Misha

Sam Strike

Glukhov

Alex Ferns

Bacho

Fares Fares

Titenok

Sammy Hayman

Prosecutor Andrei Stepashin

Michael McElhatton

Mikhail

Michael Socha

Oksana

Laura Elphinstone

Oksana's Kid

Jan Ricica

Old Maternity Doctor

Ron Cook

Zharkov

Donald Sumpter

Bezpalov

Philip Barantini

Baranov

Oscar Dyekjær Giese

Ananenko

Baltasar Breki Samper

Pravik

Gerard Kearns

Sitnikov

Jamie Sives

Kibenok

Povilas Jatkevicius

Day Shift Worker

Caolan Byrne

Local Husband

Darius Petkevičius

Kremlin Aide Female

Amanda Drew

Local Wife at Bar

Cait Davis

Civilian

Danguole Ragazinskaite

Perevozchenko

Jay Simpson

Nikolai Gorbachenko

Ross Armstrong

Kirschenbaum

Joshua Leese

Vladimir Tishchura

Matas Dirgincius

Night Shift Worker

Stephen Bisland

Petrovich

Alex Blake

Dmitri

Matthew Needham

Nurse Pripyat

Rosie Sheehy

Soldier (Hospital)

Tomas Zaibus

Major Burov

Peter Guinness

Commission Heli Pilot

Laurence Spellman

BCP HQ Aide Female

Alison Pargeter

Garanin

Victor McGuire

Ilya Ivanovich Chulkov

Sakalas Uždavinys

Soldier (Shelter)

Aidas Jurgaitis

Bartender in Polyissa Hotel

Aiste S. Gram

Stasiuk

Daniel Crossley

Marina Gruzinskaya

Lucy Russell

Zukauskas

Diarmaid Murtagh

Russian News Reader

Natasha Radski

General

Yitzchak Averbuch

Plant Employee

Joe Tucker

Yenina

Caoilfhionn Dunne

Dr. Vetrova

Pandora Colin

Niyazova

Rachel Atkins

Miner

James Cosmo

Soldier (Miner's Bus)

Arnas Danusas

Mikhail Shadov

Michael Colgan

Miner

James Kermack

Miner

Karolis Vilkas

Old Woman Babushka

June Watson

Soldier

Josef Altin

Survey Soldier

Sergejus Ivanovas

Garo

Alexej Manvelov

Janek

Josef Davies

Elderly Librarian

Velta Zygure

KGB Agent Library

Paulius Cizinauskas

Jughashvili (Robot Operator)

Mark Bagnall

Site Officer Masha

Ian Pirie

Biorobot

Andrew Sheridan

Biorobot Soldier

Lukas Malinauskas

Biorobot Soldier

Marius Karolis Gotbergas

KGB Driver

Simonas Dovidauskas

Judge Milan Kadnikov

Hilton McRae

Khodemchuck

Kieran O'Brien

Soldier (Reactor Site)

Šarūnas Datenis

Soldier (Mobile Office)

Deividas Breive

Director

Johan Renck