I've liked it so far, though do feel like Dexter isn't as smart as he should be at times.
I'm assuming that Harrison has to eventually find out about Dexter's hobbies, though can also see them trying to show Dexter as trying to do the opposite of Harry and guide Harrison away from his own dark passenger. Whether or not that succeeds or not will be the question. I guess by following the code, we could even get a Harrison kills Dexter/Kurt via his newly taught code as well.
I was half waiting for them to find a trove of bodies in the cave, not just Iris. As I'm intrigued about what Kurt's whole ritual actually is, as its clear he doesn't just dump the bodies after hunting them.