Season 1

David Meanti

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Paul Ritter

Anatoly Dyatlov

David Dencik

Mikhail Gorbachev

Con O'Neill

Viktor Bryukhanov

Jared Harris

Valery Legasov

Adrian Rawlins

Nikolai Fomin

Jessie Buckley

Lyudmilla Ignatenko

Emily Watson

Ulana Khomyuk

Stellan Skarsgård

Boris Shcherbina

Adam Nagaitis

Vasily Ignatenko

Ralph Ineson

General Tarakanov

Barry Keoghan

Pavel

Brett Thomas

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Alan Williams

KGB Chairman Charkov

Mark Lewis Jones

General Pikalov

Sam Troughton

Alexandr Akimov

Robert Emms

Leonid Toptunov

Alex Ferns

Glukhov

Fares Fares

Bacho

Michael McElhatton

Prosecutor Andrei Stepashin

Lukas Kudapcenka

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Tautvydas Savukaitis

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Måns Månsson

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Francesc Prat Duten

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Chris Roufs

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Evelina Verčinskaja

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