I saw that movie. Extremely interesting.
The DVD had a "Director's cut" with a voice over. He would provide additional insight on many of the scenes.
In particular, during the Edward Teller interview, he mentioned that Dr. Teller only agreed to be filmed if they did the scene on a single take and no editing.
So his lengthy talk, done clearly and without errors or hesitation, was done on a single sitting!
It shows the power and clarity of his mind.