It is very interesting movie. The cast, directing, cinematography and all the rest is at the highest level. However, to understand the movie a person should be aware about the events that took place during the Manhattan project and following Oppenheimer investigation. The are also several historical inaccuracies, for example: Einstein was not involved in the project and the story that Teller’s calculations of the chain reaction was discussed with him is a fake. Anyway , the movie should win Oscar next year