[The JD]

I have a prediction on how the series will end. Granted, we're 2 seasons away from that, so there's lots of time to prove me wrong...but here's what makes sense to me:

We spend this season seeing Deb learn all about Harry's code (no secret there, they already showed a preview with Dexter telling Deb that Harry taught him what he knows)...so Deb learns how Dexter's adopted dad/cop taught the boy Dexter about forensics and how to blend in socially, and how to target only the bad guys... meanwhile, she's struggling between her own ethics and love for Dexter, her love for her dad and her desire to be just like him....

In the final season, I'm thinking Dexter will get killed in some final show-down. (I don't think Deb will be the one to kill him- that would be far too pat and dry. But I do think it will trigger all kinds of cop responsibility and family responsibility in Deb)

So what happens to Dexter's son Harrison? Deb adopts him, of course. And in the final scene, we see Deb teaching Harry's Code to Harrison, who by this time has begun to display a few Dexter-like sociopathic tendencies of his own (and really, they're already building on this- Dex worries about that a lot, and Harrison was found sitting in a pool of blood after Rita's murder).

And so the cycle begins again. Deb always wanted to be like Harry (another ongoing theme of the series). Now she is.

Anyway. Just an idea.