as Himself

as Fedor's Father

as Fedor's Son

as Chernobyl Historian

as Chernobyl Chief Engineer

as Duga Data Commander

as Himself - CBS News Foreign Correspondent (archive footage)

as Chernobyl Engineer

as Radar Professor

as Former President Russia (archive footage)

as Former President Ukraine (archive footage)

as Last Soviet Head of Atomic Energy

as Head of Chernobyl Investigation Committee

as Mayor of Kiev

as