The flash-backs better return and probably will when Dexter begins having to accept that Harry is the only person who can help him, so he'll look back. But also Fantasy Harry is really great, i.e. the park scene.
The ending, by the way, left me speechless. This is the best episode of Dexter in a long time. "Finding Freebo" was wow. That is all. The direction this season is taking is great. I'm so glad they have found a way to keep up with the brilliance of the second season in a great way. They knew what to do and how to do it with this one. Dexter giving up the code for his own was bound to have a lot of issues, such as losing sight of killing with a purpose.
Wow. Just...wow. Best show ever? Yes. Yes it is.