This is an amazing story and despite straying from reality in several places it is still well worth the watch.. I am not going to comment on anything scientific but it holds true to the dire threat that this accident had and still has on Europe and especially the Ukraine. The story is a tad dark and rightly so , as it puts reality and politics at odds with each other. There are so many great actors in this series that to single out one would be an injustice to the others.. I have only one complaint and that is when a story purports to be true .. make it true, when will the social demand for adding or changing the story to satisfy someone's desire for pursuing their own agenda stop? There was no woman physicist .! I guess I don't like reality manipulation!!