In the upcoming special two-hour episode of “Once Upon a Time,” secrets about Dark Emma (Jennifer Morrison) will be revealed.

A teaser for the series event, which includes Season 5 Episode 8, titled "Birth," and Episode 9, titled "The Bear King," shows that Emma’s boyfriend Hook (Colin O'Donoghue) will stick with her no matter how dark matters gets.

“I love you no matter what you’ve done,” Hook says in the clip.

“You really want to know the truth no matter how awful?” Emma asks.

“I do,” says Hook, who seems ready for anything.

In a interview with ET, Morrison sounded confident that her character would be able to keep Hook as a mate, regardless of how evil she would become over the season.

"Maybe I'll just, you know, suck him into the darkness with me," the actress said.

A clip from the first part of the two hour event, shows Emma facing off before a gang of adversaries, all ready to use their magic on her.

Emma, believing that she has the upper hand, says that she will hand over a dagger and the Promethean Flame to Arthur (Liam Garrigan) when he releases her family.

“No,” Arthur says. “You will hand it over now or I unleash Merlin.”

Merlin (Elliot Knight) pleads with her to do as Arthur says.

“Emma, please, I don’t want to fight you,” he says.

As fans know from "Camelot" lore, Merlin is the spawn of Satan and seems to be fully aware that he can do some major damage.

ET reports that fan favorite Victoria Smurfit will also soon be back on the show as Cruella de Vil, in an ensemble event that brings together characters like Peter Pan and the Magic Mirror.

The “Once Upon a Time” two-hour event airs Sunday, Nov. 15 on ABC at 8 p.m. ET.