Please Remain Calm

Jared Harris

Valery Legasov

Stellan Skarsgård

Boris Shcherbina

Emily Watson

Ulana Khomyuk

Paul Ritter

Anatoly Dyatlov

Jessie Buckley

Lyudmilla Ignatenko

Adam Nagaitis

Vasily Ignatenko

Sam Troughton

Alexandr Akimov

Robert Emms

Leonid Toptunov

Con O'Neill

Viktor Bryukhanov

Adrian Rawlins

Nikolai Fomin

Alan Williams

KGB Chairman Charkov

David Dencik

Mikhail Gorbachev

Mark Lewis Jones

General Pikalov

Ralph Ineson

General Tarakanov

Barry Keoghan

Pavel

Alex Ferns

Glukhov

Fares Fares

Bacho

Michael McElhatton

Prosecutor Andrei Stepashin

Laura Elphinstone

Oksana

Nadia Clifford

Dr. Svetlana Zinchenko

Matthew Needham

Dmitri

Rosie Sheehy

Nurse Pripyat

Tomas Žaibus

Soldier (Hospital)

Ron Cook

Old Maternity Doctor

Peter Guinness

Major Burov

Laurence Spellman

Commission Heli Pilot

Alison Pargeter

BCP HQ Aide Female

Victor McGuire

Garanin

Sakalas Uždavinys

Ilya Ivanovich Chulkov

Aidas Jurgaitis

Soldier (Shelter)

Aiste S. Gram

Bartender in Polyissa Hotel

Daniel Crossley

Stasiuk

Lucy Russell

Marina Gruzinskaya

Donald Sumpter

Zharkov

Diarmaid Murtagh

Zukauskas

Natasha Radski

Russian News Reader

Yitzchak Averbuch

General

Joe Tucker

Plant Employee

Philip Barantini

Bezpalov

Oscar Dyekjær Giese

Baranov

Baltasar Breki Samper

Ananenko

Darius Petkevičius

Local Husband

Amanda Drew

Kremlin Aide Female

Michael Socha

Mikhail

Cait Davis

Local Wife at Bar

Karl Davies

Viktor Proskuryakov

Jan Ricica

Oksana's Kid