If either of these things happened, especially the second, I would declare Dexter the worst show on television.

Dexter may pride it's often humorous quick fix solutions to stories, but if they tried that with this one, it'd definitely kill the show. They wrote Debra finding Dexter killing Travis, they're going to have to live up to it.

Which, is why it's such a good thing, because they're going to have to prove their salt as writers.

Honestly, if I was writing it, I'd have Debra completely flip out, and try to arrest Dexter. Dexter coerces her into believing that this was his first kill, and talks her out of arresting him. After all, she let Matthews go, why would she arrest her own brother? Maybe even Dexter pulling out sappy melodrama talking about his friend Brother Sam dying, and more importantly the stress of Rita dying(Which is strangely not on his mind at all whatsoever anymore).

As the season goes on, Debra is revealed to new evidence that forces her to reopen the bay harbor butcher case. Finding that Doakes was completely innocent. Possibly something to do with Lily dying in Paris from the second season. While this happens, Masuka's nerdy assistant gradually finds Dexter out more, and more, becoming his admirer/worshiper(as they seem to obviously be doing).

Of course, all the while, Dexter is distracted by another serial killer of some variety. Debra eventually, however, figures out that Dexter was the Bay Harbor butcher, runs into a moral crises, finally deciding to arrest her own brother.

The season ends with Dexter being taken to jail, Social services taking away Harrison. But escaping with the aid of Masuka's obsessed assistant. Leaving for one final season where Dexter is on the wrong side of the law. Capping off the show with him retrieving Harrison, Leaving in incognito with his son, apologizing to his sister, and such.

I doubt that will happen, though. I'd be sorely shocked if they didn't immediately milk the concept of Dexter unveiling his 'dark secret' in a very Machiavellian fashion right off the bat. Still, doesn't mean they couldn't write their way out of it. I'm hoping they do, as if they do, they have some promising television ahead.

Whatever they do, they have to set Harrison between the law, and Dexter. I don't think they can have him kill Debra. Maybe somebody else kills Debra to save Dexter against his wishes, or something of that variety.