A film about mathematics that actually contains mathematics!

Rating: 10/10 (23 January 2017)

Others have said what a wonderful film this is on the civil rights and historical issues and I won't repeat all that.
I'm a professional mathematician. It was really wonderful to see a film which has science and mathematics as part of its subject where you actually get a flavour of what the science is. So often (for example in the film about Ramanujan) the makers are so scared that they give no real clue to what the science is about. This film is different: it brings science alive to the general public. A must must see, not just for the stories of these heroic people, but also as an example of the way public engagement in science should be done---not in a patronising or "spooky" way, but by giving at least some idea of what the scientists were actually doing, and why it mattered. And to do that while also dealing with what is, I imagine, the main point of the film is an act of cinematic genius.