'Westworld' Finale: Ed Harris on Man in Black's Shocking Twist

MAJOR, major spoilers ahead!!

ByABC News
December 5, 2016, 12:42 PM

— -- Spoilers ahead!

Well, here it goes. Those who have not seen the Season 1 finale of "Westworld," look away now!

No, really, click out of this and read about "The Walking Dead" or something.

On Sunday night's big conclusion, titled "The Bicameral Mind," Ed Harris' character was revealed to be something many fans never saw coming. To be fair, some on the internet did, and their hypothesis was confirmed.

Harris has been playing the Man in Black, an older guest of Westworld who has been touring the park on a quest for a fabled maze that he says he needs to find and solve. He's also been killing a lot of the robot hosts and doing terrible things to them, Dolores specifically, on his journey to this alleged maze.

On the other side of the coin, Jimmi Simpson's character, William, has been featured as a young newcomer to the park who developed feelings for Dolores.

The audience found out last night that William and the Man in Black are one in the same, with storylines in the park at different times. Yep, the seemingly sweet William becomes an angry man with a taste for blood.

Harris spoke to Entertainment Weekly about the reveal and when he found out the news.

"I became aware as Jimmi started showing up, and I was then informed that he was playing my younger self. So I was aware of the experience he was having in the park," he said. "We rarely saw each other on set, and when [we did], it was very cordial, but we didn't speak about what was going on. We never really talked about it."

Harris said he wasn't concerned with what the younger William was doing, just "the present time — that's my business."

In one scene from last night's finale, Dolores realizes the identity of the Man in Black, then she turns on him and attacks. Harris said filming such a big scene was "kinda fun."

"It was certainly fun for her. It was fun doing the physical stuff. She becomes this superstrong, 180-degree turn from the country girl she had been in the past," he said. "Evan Rachel is pretty great in this thing. All the actors playing the hosts blow my mind."

As for the maze, it turned out that it was just a child's toy, not a human-scale maze with a center he could reach. When he discovers this, the Man in Black said, "What is this s---?"

"I’m still not quite clear on what the maze was supposed to have represented," Harris said. "But the fact that it didn't really mean anything or didn't exist ... I haven't penetrated that."

Harris added that he'll be back for Season 2 when "Westworld" continues on HBO.