There were a bunch of cinematographic homages - I'd need to rewatch to catch all of them, but the one that clued me in was actually Kalinda catching the rolldown top of the elevator, like, yes, that reminds me of the last time she and Lana hid behind that kidn of door... :P

I can't decide what I thought of the Elsbeth's head thing! On the one hand, I liked the way she used it, but on the other it was a little trite. But on the other other hand it's still not clear exactly how it works, which is nice? Sigh.