cokebabies
Super Freak
Uh.. ok now you lost me.
Harry is just a personification of Dexter's inner thoughts. When you see them conversing that's simply Dexter talking to himself. That's how I've always looked at it. So for me it doesn't matter if he's talking to Harry, his brother or himself out loud/ with a voice over; he's still just talking to himself. So no connection there for me.
They should have Dexter act out Harry's lines in Harry's voice, so he does a double dialogue like Gollum.