Bates Motel has officially reached it's Psycho limit in the season finale.

The movie Psycho embarked upon Norman Bates managing the motel where he's already developed an obsession with his dead mother. And Bates Motel started off with the mother and son's lives before the chaos ensued.

Every episode pretty much got crazier and crazier, and the Season 4 finale really went there.

SPOILER ALERT

Viewers had to know that Norma was going to die at some point since she's dead in the original film. But, surprisingly, she was killed off in the finale even though there is still one season of the series left.

So why kill her now?

Executive producers Kerry Ehrin and Carlton Cuse explained that decision in Monday's report from TV Line.

"We wanted the final season to allow us to do our version of the Psycho lore," Cuse said. "We will be colliding with certain events in the narrative of the film, but it would be boring to just recreate Psycho."

"The obsessive love of Norma is what the show is going to be based on," Ehrin added. "It's the heart of what drives it. That is going to be hugely important in Season 5."

The producers also made it clear that Vera Farmiga, who plays Norma, will indeed be back for the fifth season, but it will be a "modifed role."

"She's existing now in Norman's brain," Cuse revealed. "In the original Psycho you don't really know anything about Norma Bates. You just know that she's a corpse, and you imagine that she was this shrew of a woman who berated her son into becoming crazy. But we re-imagined their relationship as this complex, intense, co-dependent love story. And that relationship continues very much in Season 5."

Bates Motel Season 5 is expected to premiere next spring on A&E.