Episode 7
Episode 7 is absolutely brilliant IMO. Definitely the best episode so far. So much ominous buildup, and so engaging all the way around. I was on the edge of my seat through the whole thing-- just fantastic storytelling and top notch acting.
I also enjoyed E6 quite a lot as well. Seems to be getting better and better, aside from the kind of weak E3 (which is still higher quality than almost anything you'll find in TV or streaming).