Episode 4 didn't exactly let me down, best episode so far and this is now my favorite show this season (sorry Koyani).
Spoiler for episode 4:
This episode focused mainly on Karada and Hiro as many of you have probably understood. It was quite calm and peaceful but with a more dramatic turn at the end, much like the previous episodes.
I couldn't help it, I had that "magical" incest feeling...