'The Originals' season 3 episode 17 spoilers: Finn and Elijah set aside their differences to save Freya in 'Behind the Black Horizon'

Matt Donovan (left) from "The Vampire Diaries" will attempt to block Finn and Elijah's way to Mystic Falls in "The Originals" season 3 episode 17. Annette Brown/The CW

"The Originals" season 3, episode 17 sends Elijah and Finn to Mystic Falls. Titled "Behind the Black Horizon," the duo will be helping each other to save Freya.

It was also Freya who believes Finn's return is the perfect opportunity to "fix what's broken." It turns out she was right, but the twist is that it will be her abduction that will help the warring brothers bond in "The Originals" season 3, episode 17.

Finn and Elijah's trip to Mystic Falls result to a run-in with Deputy Donovan. While the character from "The Vampire Diaries" will be featured in this "The Originals" season 3 episode, executive producer Michael Narducci is not willing to go as far as calling it a crossover.

"I would say it's an appearance — a special guest appearance — but I wouldn't call it a crossover and get fans believing we're doing some big epic thing," Narducci told TV Line. "It's a small story, though we do get to see a pretty nice payoff to it," the EP went on to say.

He added that the two shows are basically in one universe so "The Originals" will drop by Mystic Falls, which he deemed a "hallowed ground" for the two shows, every now and then.

It's already a big challenge for Finn and Elijah to work together. Deputy Donovan will only make it tougher for the two. However, Narducci said that fans have every reason to be worried about him, after all the normal human being is going after two Mikaelsons aka the most powerful vampires in the face f the earth.

Meanwhile, Freya's abductor in "The Originals" season 3, episode 17, who was revealed to be Lucien, desires to be a superior version of an Original vampire ("an upgrade") and Freya will help him achieve this new level of power, unless, of course, Finn and Elijah get there in time.

In this "The Originals" season 3 episode, Klaus and Hayley's dealings involve unravelling Lucien's plans. Along the way, the two will find themselves starting to heal. Expect "humor and reasoned arguments" from the two in this episode.

"The Originals" season 3, episode 17 airs April 8 at 9 p.m. ET on CW.

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