Main Characters Valery Legasov 5 main appearances Boris Shcherbina 5 main appearances Lyudmilla Ignatenko 5 main appearances Ulana Khomyuk 4 main appearances Anatoly Dyatlov 4 main appearances Alexandr Akimov 4 main appearances Vasily Ignatenko 4 main appearances Leonid Toptunov 4 main appearances Nikolai Fomin 3 main appearances Viktor Bryukhanov 3 main appearances KGB First Deputy Chairman Charkov 3 main appearances General Tarakanov 2 main appearances Colonel General Pikalov 2 main appearances Michail Gorbatchev 2 main appearances Pavel Yefremov 2 main appearances Bacho 1 main appearances Andrei Glukhov 1 main appearances Prosecutor Andrei Stepashin 1 main appearances
Recurring Guest Characters Garo 1 guest appearances Janek 1 guest appearances Elderly Librarian 1 guest appearances KGB Agent Library 1 guest appearances Jughashvili (Robot Operator) 1 guest appearances Site Officer Masha 1 guest appearances Biorobot 1 guest appearances Biorobot Soldier 1 guest appearances Biorobot Soldier 1 guest appearances KGB Driver 1 guest appearances Judge Milan Kadnikov 1 guest appearances Khodemchuk 1 guest appearances ⇤ « 1 2 3 4 » ⇥