Can you guess what Jonathan Nolan and Lisa Joy are referring to?
Warning: This article contains spoilers fromWestworldseason 4, episode 1.
The Man in Black has returned.

Ed Harris is back as William (or is it robo-William?) in the ‘Westworld’ season 4 premiere.Courtesy of HBO
(Some form of him, anyway.)
And he has his sights set on the Hoover Dam.
HBO’sWestworldkicked off its new mystery in season 4 by picking up several years after the season 3 finale.

The roomies head to a restaurant, where Christina (Evan Rachel Wood) will go on a not-so-great blind date in ‘Westworld’ season 4.John Johnson/HBO
“What I want is already in there,” he mentions.
“It was stolen from me from one of my facilities eight years ago.”
The person who stole this thing is a woman, and she’s dead.
“Which means I can’t decrypt it and no one else can,” he continues.
“I don’t want it moved or disturbed, so I’ll take the whole shebang.”
WestworldcreatorsJonathan NolanandLisa Joy, of course, aren’t giving away their secrets just yet.
“I’ll say that much.”
Maybe his guest book?
And what’s with all the flies (or robo-flies?)
he can command and force others to do his bidding?
ENTERTAINMENT WEEKLY: Let’s start with one of the first things we see.
It was kinda like, “Do you think they would let us?”
“Yeah, sure.”
But it’s our vision of what happens.
And sadly, the vision’s coming to pass a little faster than we’d hope.
What would they do with it?
What’s its second life gonna be?
It looks like the Forge, almost.
So it’s not actually that farfetched to imagine that this would be a great place.
We think of it as a cloud, but these are actual physical spaces.
The hard reality of where those data spaces exist was something we were fascinated by.
We do know some things.
Though it sounds a little friendlier than I think host Man in Black is.
He feels something has been stolen from him.
We don’t yet know what that is.
I’ll say that much.
We also see this swarm of flies.
They cameod in the first season.
And it has arrived.
So that’s just a lovely way to come full circle.
The sense that you’ve missed this tiny thing, but when you stack it up…
I just felt like I was, I was writing my 20s.
Am I an idiot?"
[Laughs]
What can you tell us about this city in which Christina finds herself?
“That was way better than I expected.”
“This place is f—ing wild.”
“I can’t believe this is your first time.”
It made me think, Is this an actual city?
But this is an awfully big city.
If it’s a park, it’s an awfully big one.
The intention here is for the audience to feel the reality of New York.
I shot on my first series [Person of Interest] in New York for five years.
It’s one of my favorite places to shoot in the whole wide world.
Who couldn’t resist the idea that we would take our story to the real New York?
I’ll leave it at that.
Everyone’s understanding of what the world is now radically [different].
We all used to have a fairly good set of facts we could agree on.
“Am I being watched?
Am I safe?”
“You’re making me want this or do this.”
It also stays true to the relatability that I want Christina to have to people inourworld.