Directed by Johan Renck   Written by Craig Mazin   Cast Baltasar Breki Samper ... Ananenko Philip Barantini ... Bezpalov Oscar Dyekjær Giese ... Baranov (as Oscar Giese) Mark Lewis Jones ... General Pikalov Stellan Skarsgård ... Boris Shcherbina Jared Harris ... Valery Legasov Jessie Buckley ... Lyudmilla Ignatenko Caoilfhionn Dunne ... Yenina Pandora Colin ... Dr. Vetrova Adam Nagaitis ... Vasily Ignatenko Gerard Kearns ... Pravik Povilas Jatkevicius ... Kibenok Rachel Atkins ... Niyazova David Dencik ... Mikhail Gorbachev Darius Petkevicius ... Local Husband Cait Davis ... Local Wife Emily Watson ... Ulana Khomyuk Alex Ferns ... Glukhov James Cosmo ... Miner Arnas Danusas ... Soldier (Miner's Bus) Michael Colgan ... Mikhail Shchadov James Kermack ... Miner Karolis Vilkas ... Miner Paul Ritter ... Anatoly Dyatlov Sarunas Datenis ... Soldier (Reactor Site) Deividas Breive ... Soldier (Mobile Office) Robert Emms ... Leonid Toptunov Sam Troughton ... Alexandr Akimov Michael Shaeffer ... Blond Man Amanda Drew ... Kremlin Aide Female Alan Williams ... KGB Chairman Charkov Ralph Ineson ... General Tarakanov Barry Keoghan ... Pavel Produced by Jane Featherstone   Chris Fry   Robert How   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 20, 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 -- / 10 Our Rating -- / 10 Your Friends -- / 10 Male Users -- / 10 Female Users -- / 10 Site Ranking #127 / 21,118 Site Ranking