So, I still stand by the statement that episode 4 was the best of the series. Its worth re watching just for the line that Delos says to Elsie and Bernard which we take to be crazy person babble, but turns out to be more tragic after a scene in the finale. Focus on the Bernard and Elsie stuff. I think there is a lot of timeline-memory hyjinx going on. First off, Elsie just tied to a wall with some protein bars and a pot? ...ok, whatever, but as soon as Elsie starts poking into Delos' room, Bernard starts memory hopping and even says to Elsie something to the effect of "I'm not with you right now am I?" which implies he is remembering what happens in the round room from EARLIER. There is a kind of cutaway both before and after they encounter Delos, and they are back in that outside room with the doods Bernard killed with his bare hands. Watch the sudden stink eye that Bernard is giving Elsie. He now realizes "wait...why doesn't Elsie remember all of that from before?! She must be..." and then they go into a convo of Bernard saying he was here to make a host and playing dumb about whom of was. Obviously, it was Delores in the Hale body, but I suspect he might have made two hosts, one of which was a new version of Elsie. Right before Hale killed her, she mentions that they have all the data on the employees as well, which was awfully convenient to drop right then. Alternately, the Elsie that Hale shot was maybe already a host and it was Bernard who killed her to begin with. They did rather awkwardly show Hale moving Elsie's body where they piled the dead hosts just before her doppelganger killed her.