 The next step in Finn's plan sees him interfere with Susan's multiple sclerosis (MS) medication, resulting in her hospitalisation and his promotion to acting principal.While shooting the medication swap scene, the director asked Mills to make it clear that Finn did not find his decision easy, showing that he was not all bad and had chosen "the darker path" as it was the quickest way to achieve his goal.Mills said that Finn has to use Susan's collapse to remind others that she is not fit to run the school, which convinces them that he is the best person for the position.