Benedict Cumberbatch as Greville Wynne

Merab Ninidze as Oleg Penkovsky

Rachel Brosnahan as Emily Donovan

Jessie Buckley as Sheila Wynne

Angus Wright as Dickie Franks

Kirill Pirogov as Gribanov

Iva Šindelková as Embassy Assistant

Vladimir Chuprikov as Nikita Khrushchev

Fred Haig as Lee

Emma Penzina as Nina

Mariya Mironova as Vera

Anton Lesser as Bertrand

Miles Richardson as Golf Exec

Keir Hills as Andrew Wynne

Petr Klimeš as Popov

Zeljko Ivanek as CIA Boss

David Bark-Jones as Golf Exec

Marian Lorencik as Russian Trade Delegate

Benny Maslov as Russian Interpreter

Marián Chalány as Penkovsky's Driver

Alice Orr-Ewing as Tamara

Oliver Johnstone as Lovett

Andruscha Hilscher as KGB Handler

Olga Koch as Irina

Jonathan Harden as Leonard

Elina Alminas as Doctor

Eysteinn Sigurdarson as Curt

Richard Glaves as Howard

Aleš Bílík as Customs Officer

Laurel Lefkow as Embassy Guest

Ondřej Malý as Mitrokhin

Andrey Kurganov as Russian Plane Passenger

James Schofield as Cox

Kemal Shah as MI6 Worker