This is quite a compelling story of three ladies who played a crucial part in the NASA operation that ultimately put John Glen into space. All three were mathematicians drafted in to provide their skills but unlike so many of their colleagues, they were subject to prejudices surrounding their race and their gender. The women adopted the best solution to combat this bigotry, though - they decided there are more ways than one to skin a cat and so let their astonishing talents do their talking for them. Luckily, Katherine Johnson (Taraji P. Henson) had a boss in Al Harrison (Kevin Costner) who was essentially a practical and politically motivated man who cared far less about segregation and much more about beating the Soviets into space. His attitude, that swiftly builds into a considerable degree of respect, enabled her to step up and demonstrate she was every bit as good, if not better, than those white men around her - all rather uniformly dressed in white shirts and ties. Across the corridor, the equally adept Dorothy Vaughan (Octavia Spencer) was fighting her own battle for recognition as the supervisor of a crack team that was charged with installing, programming and validating the workings of a brand new IBM computer. Finally, the triumvirate was made up by Mary Jackson (Janelle Monáe) whose skills were going to be crucial if the heat shield on the module charged with getting the astronaut (Glen Powell) back to Earth safely was going to work properly. Director Theodore Melfi manages to delicately marry these three threads together keeping the story interesting and investing us not just in the struggles of these women but also in the excitement of the practical science unfolding before us. Henson and Spencer are convincingly understated with their performances and though Monáe is less prominent, the three characterisations still resonate well and informatively. I knew nothing of those people before I watched this - I'm glad I did.