It was just announced on the show’s official Facebook page that Dexter will be coming to an end after this season.
Here is the official statement:
To thank you for your love and support over the last seven years, we wanted our Facebook fans to be the first to know that the upcoming season will be the final season of Dexter.
This doesn’t really come as much of a “surprise, motherfuckers”; we all but knew this was coming, even though we didn’t want to accept it. While I selfishly don’t want the show to end, part of me objectively knows that it gets increasingly difficult to keep a series going for this long and keep it at the same level of high quality. Honestly, without giving away anything about the show’s first seven seasons (if you haven’t watched them, really, get on that), it’s hard to see how the series could go for much longer, anyway, without changing drastically.
Here is the sneak peek which accompanied the above statement. Be aware that there are spoilers contained within.