From a film makers angle, serial is numero uno & audience love it. From a historical perspective, I don't know as I wasn't there. It's always tricky, isn't it making a real life event motion picture that concerns both nation interest & intelligence. The only aspect one finds off beat is crowd belonging to Chernobyl speak ukrainian not english. Channel like HBO with infinite resources could have managed. But it's quite understandable as finding fine actors speaking native language could be a challenge.