Sunday night on "Dexter," the fourth season went out on a shocking note. This article contains spoilers. Do not read it if you do not want to be spoiled. Video clip included.

We are warning you once again: The "Dexter" season four finale had quite the ending and if you haven't watched it yet and are planning to watch it, do not keep reading.

Holy crap, guys. The Trinity Killer killed Rita and left Harrison sitting in her blood. Dexter's life has come full circle. He was born in blood in the shipping container where his mother was murdered and now Harrison was born in blood in the bathroom where his own mother was murdered. The one nice "out" they have in not making Harrison a serial-killer-in-training is that he's significantly younger than Dexter was when it happened to him -- Harrison is only like a year old and Dexter was 5 or 6 years old. We can all buy that Harrison is not as psychologically affected as Dexter was.

The other big "reveal" was Deb's finding out that the Ice Truck Killer was Dexter's half-brother.  Has she put it together yet that she and Dexter are actual half-siblings? This was resolved in season 1 and I had simply forgotten. My apologies. They are not actually related. I'm sure it's still quite the mind-trip for Deb, however.

There are so many questions about next season. What will happen to Astor and Cody? Will they stay in Dexter's life or go to live with their grandparents? Will he be a single dad to Harrison?  What about the Mitchell family? Did anybody else think Dexter's cover was blown right then and there when they got taken out of their house? There HAS to be some resolution with that, one would think.