The word ‘hereafter’ is typically used to mean “from now on”, or to borrow the dictionary definition “after these events” or “in the future”. The episode title itself suggests a major turning point, a significant event or series of events. And then of course, as per the press release, we’re going to see a major event for Director Vance as well.
I really love the episode titles for this show, I really do. Sometimes I think whoever comes up with them is a genius.