“Westworld” star Jimmi Simpson, who plays idealistic park-goer William in the HBO sci-fi series, cannot wait for fans to see the season finale.

“It’s a humdinger,” he told Paste Magazine. “The fact that this many people are seeing something I’m actually proud of, I’m beside myself.”

Naturally, Simpson did not reveal any spoilers for the finale. His co-star Evan Rachel Wood already told the Huffington Post that the episodes leading to the finale will leave fans’ minds blown and their hearts broken, so she has already set the stage for a lot of shocking revelations.

“We’ve established that the farther out you go, the more intense the game gets, and man, were they not kidding because when we started getting the scripts after episodes it was like, ‘Whoa! OK!'” Wood said. “Not only are they dropping bombs left and right, but some of the days on set, I would be like, ‘Look, I’ve seen some stuff, and this is WILD.'”

However, eagle-eyed fans have already a couple of guesses on what will happen during the finale. A fan favorite theory is that William will eventually become the Man in Black played by Ed Harris.

Many fans believe “Westworld” is showcasing two different timelines, and William and the Man in Black are actually the same man. The episode “Trace Decay” further backed up this theory, according to the Hollywood Reporter.

The Man in Black told Teddy Flood (Dolores Abernathy) that he is a “god” of sorts outside the park. He considered himself “a titan of industry, a philanthropist, and a family man.”

Sadly, his wife committed suicide a year ago and their “30 years of marriage” went down the drain. His daughter blamed him for his wife’s death, so he went back to the park.

Incidentally, William is engaged to Logan’s (Ben Barnes) sister, so it’s possible William left Westworld a changed man, married Logan’s sister, then went on to become a corporate success but a personal failure.

Another big clue backing up this theory is the reappearance of host Angela (Talulah Riley). She was the host who greeted William in the episode “Chestnut,” and when the Man in Black saw her in “Trace Decay,” he made a comment: “I would have thought they'd retired you.”

She is now playing a double agent for the villain Wyatt, and according to Slash Film, it just makes no sense for Riley to be playing both Angela and Wyatt’s secret agent at the same time. Most likely, she used to play Angela and have since then been transformed as one of Wyatt’s cohorts.

“Westworld” airs every Sunday at 9 p.m. ET on HBO. Westworld Jimmi Simpson as William in a scene from “Westworld.” During the Season 1 finale, it was finally revealed that he grew up to become the mysterious Man in Black played by Ed Harris. Photo: HBO