Has there ever been a more amazing or mind blowing reveal than what the Duffer brothers gave us in "The Massacre at Hawkins Lab?" Peter the friendly/creepy orderly is actually Henry Creel. I mean, he's actually 001.  What I mean to say is that he is Vecna.  And to top it all off, El created Vecna!?!?!  Wow, what a crazy twist.  Then you add in the most amazing demogorgon fight scene we've ever seen with the most exploration of the upside down that we've ever seen, and you have one amazing episode of Stranger Things.