How the stories of Katherine G. Johnson, Dorothy Vaughan and Mary Jackson managed to not become common lore in NASA’s history until now could only be put down to racial and gender prejudice. And while writer/director Ted Melfi (St Vincent) has told this inspiringly important and fascinating story to a decent degree, Hidden Figures is let down by a hokey script that is laced with safe racism, giving the film a conventional Hollywood feel, one that takes away from the remarkable story. During the space race between the USA and the USSR in the 1960s, three African-American women broke huge…