Episodes 1:23:45 May 6, 2019 Please Remain Calm May 13, 2019 Open Wide, O Earth May 20, 2019 The Happiness of All Mankind May 27, 2019 Vichnaya Pamyat June 3, 2019 Directed by Johan Renck Written by Craig Mazin   Cast Jared Harris ... Valery Legasov (5 episodes) Jessie Buckley ... Lyudmilla Ignatenko (5 episodes) Stellan Skarsgård ... Boris Shcherbina (5 episodes) Adam Nagaitis ... Vasily Ignatenko (4 episodes) Paul Ritter ... Anatoly Dyatlov (4 episodes) Sam Troughton ... Alexandr Akimov (4 episodes) Robert Emms ... Leonid Toptunov (4 episodes) Emily Watson ... Ulana Khomyuk (4 episodes) Karl Davies ... Viktor Proskuryakov (3 episodes) Laura Elphinstone ... Oksana (3 episodes) Michael Socha ... Mikhail (3 episodes) Con O'Neill ... Viktor Bryukhanov (3 episodes) Adrian Rawlins ... Nikolai Fomin (3 episodes) Jan Ricica ... Oksana's Kid (3 episodes) Alan Williams ... KGB Chairman Charkov (3 episodes) Michael Shaeffer ... Blond Man (2 episodes) Joshua Leese ... Kirschenbaum (2 episodes) Adam Lundgren ... Brazhnik (2 episodes) Paulius Markevicius ... Aleksandr Kudryavtsev (2 episodes) Jay Simpson ... Perevozchenko (2 episodes) Billy Postlethwaite ... Boris Stolyarchuk (2 episodes) Ross Armstrong ... Nikolai Gorbachenko (2 episodes) Douggie McMeekin ... Yuvchenko (2 episodes) Karolis Kasperavicius ... Viktor Degtaryenko (2 episodes) Gerard Kearns ... Pravik (2 episodes) Povilas Jatkevicius ... Kibenok (2 episodes) Nadia Clifford ... Dr. Svetlana Zinchenko (2 episodes) Ron Cook ... Old Maternity Doctor (2 episodes) Jamie Sives ... Sitnikov (2 episodes) Donald Sumpter ... Zharkov (2 episodes) Amanda Drew ... Kremlin Aide Female (2 episodes) David Dencik ... Mikhail Gorbachev (2 episodes) Mark Lewis Jones ... General Pikalov (2 episodes) Cait Davis ... Local Wife at Bar (2 episodes) Darius Petkevicius ... Local Husband (2 episodes) Baltasar Breki Samper ... Ananenko (2 episodes) Philip Barantini ... Bezpalov (2 episodes) Oscar Dyekjær Giese ... Baranov (2 episodes) (as Oscar Giese) Ralph Ineson ... General Tarakanov (2 episodes) Barry Keoghan ... Pavel (2 episodes) Sam Strike ... Misha Sammy Hayman ... Titenok Matas Dirgincius ... Vladimir Tishchura Caolan Byrne ... Day Shift Worker Stephen Bisland ... Night Shift Worker Alex Blake ... Petrovich Tomas Zaibus ... Soldier (Hospital) Matthew Needham ... Dmitri Rosie Sheehy ... Nurse Pripyat Peter Guinness ... Major Burov Laurence Spellman ... Commission Heli Pilot Alison Pargeter ... BCP HQ Aide Female Victor McGuire ... Garanin Sakalas Uzdavinys ... Ilya Ivanovich Chulkov Aidas Jurgaitis ... Soldier (Shelter) Aiste S. Gram ... Bartender in Polyssia Hotel (as Aistè Gramantaitè) Daniel Crossley ... Stasiuk Lucy Russell ... Marina Gruzinskaya Diarmaid Murtagh ... Zukauskas Natasha Radski ... Russian News Reader Yitzchak Averbuch ... General Joe Tucker ... Plant Employee Caoilfhionn Dunne ... Yenina Pandora Colin ... Dr. Vetrova Rachel Atkins ... Niyazova Alex Ferns ... Glukhov James Cosmo ... Miner Arnas Danusas ... Soldier (Miner's Bus) Michael Colgan ... Mikhail Shchadov James Kermack ... Miner Karolis Vilkas ... Miner Sarunas Datenis ... Soldier (Reactor Site) Deividas Breive ... Soldier (Mobile Office) June Watson ... Old Woman Babushka Josef Altin ... Soldier Sergejus Ivanovas ... Survey Soldier Alexej Manvelov ... Garo Fares Fares ... Bacho Josef Davies ... Janek Velta Zygure ... Elderly Librarian Paulius Cizinauskas ... KGB Agent Library Mark Bagnall ... Jughashvili (Robot Operator) Ian Pirie ... Site Officer Masha Andrew Sheridan ... Biorobot Lukas Malinauskas ... Biorobot Soldier Marius Karolis Gotbergas ... Biorobot Soldier Simonas Dovidauskas ... KGB Driver Michael McElhatton ... Prosecutor Andrei Stepashin Hilton McRae ... Judge Milan Kadnikov Kieran O'Brien ... Khodemchuck Uncredited Cast Dainius Jucius ... Minister of Finance of Pripyat Roman Listopad ... Civilian Danguole Ragazinskaite ... Civilian Petras Simonis ... Dyatlov's Guard Tomas Zaibus ... Policeman Kadrolsha Ona Carole ... Civilian in a Hospital Bartas Erminas ... Civilian in a Hospital Peter Jennings ... Self (archive footage) Jimmy Walker ... Airman Pavel Mikhail Gorbachev ... Self (archive footage) Produced by Jane Featherstone   Chris Fry   Robert How   Olga Kashirina   Michael Kitaev   Jacqueline Lesko   Craig Mazin   Anne Mensah   Lina Miseikyte   Johan Renck   Gabriel Silver   Darko Skulsky   Tanya Sokolova   Carolyn Strauss   Gary Tuck   Sanne Wohlenberg   Jane Yatsuta   Original Music by Hildur Guðnadóttir

Additional Info Premiere: May 06, 2019 DVD Release: October 01, 2019 Blu-ray Release: October 01, 2019 Countries: Distributor: HBO Studios Websites: Production Companies Home Box Office (HBO) Sister Pictures (produced by) Sky Television The Mighty Mint (produced by) Word Games (produced by) Distributors Home Box Office (HBO)   (2019) (USA) (TV) HBO Max   (2020) (USA) (video) (VOD) Rating Stats Overall Rating 9.3 / 10 Our Rating -- / 10 Your Friends -- / 10 Male Users -- / 10 Female Users -- / 10 Site Ranking #126 / 20,875 Site Ranking #122 The Big Bang Theory: Holiday Collection (2022) #123 The Big Bang Theory: Holiday Episodes (2014) #124 Gravity (2013) #125 Harry Potter And The Sorcerer's Stone (2001) #126 Chernobyl (2019) #127 The Big Lebowski (1998) #128 Star Wars: Episode I - The Phantom Menace (1999) #129 Captain America: Civil War (2016) #130 Star Wars: Episode III - Revenge Of The Sith (2005)