1. In the final hour, it all comes down to Saxon and Elway. Almost as good as Colin Hanks and Imaginary Adama.
2. Deb states the show's thesis: "No matter how much selfish shit you do, Dexter, nothing is ever your fault. You deserve to be happy."
3. Wanted serial killer Hannah, by the way, was recognized by the nurse when she took Harrison to the ER, but she can walk right through airport security and present fake documents without arousing any suspicion.
4. Dexter sends Harrison off into a hurricane on a bus with his serial killer girlfriend, so he won't have to do any parenting for the rest of the series.
5. Saxon, the subject of a manhunt, goes straight to the hospital, and is caught immediately.
This is the first time in several years that Miami Metro has caught a criminal.
6. There has to be an attempt at dramatic stuff, so Deb gets brain damage. Ghost Harry has returned to his home planet, so he can't show up to explain that we should feel sad. But now, Dexter will have Ghost Deb to tell him that he should do whatever he wants all the time.
7. Professional bounty-hunter Elway finds Hannah, but lets her stick him with a horse tranquilizer and escape.
8. Dexter kills a handcuffed Saxon in a police interrogation room. But it's okay, because in Florida, this is self-defense. Also, the interrogation room has a video camera, but no audio.
9. Dexter goes into the hospital, kills Deb, wheels her body out of the hospital on a gurney and carries her onto a boat, because nobody in Dexter's Miami pays attention to anything, and also, the hospital has boat parking.
10. On the boat in the hurricane, Dexter decides to abandon his parental responsibilities once and for all. He throws his cell phone in the ocean. Then, he throws Deb in the ocean
11. There are probably a lot of people who would like to mourn Deb, and she is entitled to a police funeral with full honors, but Dexter just throws her in the ocean, because he doesn't give a shit about anybody.
I'm sure they'll do something nice for Deb anyway. Like name a bench after her. The Deb bench next to the Laguerta bench, with Angel and Quinn sitting on the benches and crying, realizing how ****ing awful they are.
Dexter, meanwhile, will have the state of Florida renamed after him, the amazing human being he is.
Then, he drives his boat into the hurricane, because this is the responsible thing for the sole surviving parent of a small child to do.
12. Dexter is not actually dead! He just pretended to die so he could ditch his girlfriend and never have to see his son again! He is now a trucker, apparently.