I NEVER GIVE (nor do I ever read) SPOILERS
I'd been watching the finale of Season 3 in bed, struggling to stay awake. When the episode concluded I decided to just watch the opening of Season 4, episode 1 before going to sleep. This episode woke me up and I couldn't stop alertly watching until forcing myself to go to sleep at the midpoint.
Oh my gosh. The irony of what I just wrote! New Years Day now and I just finished watching the conclusion of the episode. I now realize this episode -- which I began making this comment on previously, including the title I gave this review -- is all about staying awake.
Without giving a spoiler, let me just say... WATCH this episode to its conclusion and you'll understand why I say my review here is ironic. And you'll also understand why I am giving it a well-deserved perfect 10.