I was really excited for this series as I have read a good amount about the USSR and have a personal relationship to it, having been born in a former satellite country. But I came away disappointed. The series really drew out some scenes for no reason, to the point where I felt the need to fast-forward (for example, essentially the ~entire 5 minutes of going under the core to open a valve). I was also frustrated that the series started right at the point of disaster; I think I would have appreciated more context in a backstory section. Can't recommend.