Creator Hannah Fidell has been living with the story of A Teacher for quite some time. After her 2013 independent film of the same name premiered at Sundance, she began developing how it would work as a longer story, one that explored the full ramifications of what happens when a teacher (Kate Mara) crosses the line with one of her students (Nick Robinson). The result, which just debuted on FX on Hulu, is a gripping look at a fundamentally abusive relationship, one which the show doesn't shy away from exploring in all its complications. Below, Fidell takes us through …