Yeah, I predicted early on four possible finales: 1) Harrison dies sacrificing himself for Dexter 2) Dexter dies sacrificing himself for Harrison 3) they both die 4) they both escape. The one that makes the most logical and dramatic sense is #2. I thought #4 was extremely unlikely. The whole show was about death and morality, and it took death and this situation for Dexter to finally love somebody else and make that sacrifice. But I always thought, "nobody gets out of here alive." Showrunner Clyde Phillips has said if he could have ended the original show the way he wanted to (and he had already departed after season 4), he would have had Dexter wake up in a Florida penitentiary lethal injection chamber, in a room surrounded by all the characters he had killed in the previous 50 episodes. Dexter realizes, "ah, I've just been daydreaming over everything I've done that led up to this moment," and he's ready to die and pay the price for his crimes. So it was always Phillips' intention (going back 10 years) that Dexter was going to die at the end. Even the original novelist's last book was titled Dexter Is Dead, and you can guess the plotline.