OUATep11 Goodbye, Regina? The Evil Queen (Lana Parrilla) will return in episode 11 of "Once Upon a Time" Season 4. Photo: ABC

Things are about to get ugly on “Once Upon a Time.” While Emma (Jennifer Morrison) learned how to control her powers, and Elsa (Georgina Haig) was able to reunite with Anna (Elizabeth Lail) and Kristoff (Scott Michael Foster), it will be a while before anyone gets a happy ending.

According to the synopsis for episode 11, “Shattered Sight” will find the Evil Queen’s (Elizabeth Mithcell) spell consuming everyone in Storybrooke -- except for a select few, of course. The dark magic will turn everyone against each other, and it’ll be up to Emma and Elsa to stop it before it’s too late.

Fortunately fans of the hit ABC fairytale series don’t have to wait until the episode airs to get a good look at the upcoming dangerous shenanigans. Two sneak peek videos from episode 11 of “Once Upon a Time” have been released online:

Sneak Peek #1

Snow White, the murderer? Any fans doubting how nasty the Snow Queen’s spell could get must watch Mary Margaret (Ginnifer Goodwin) in this sneak peek from “Shattered Sight.”

The video shows Anna unaffected by the curse. Elsa’s sweet younger sister has always had a positive outlook on life, and is trying to maintain that while keeping Mary Margaret, David (Josh Dallas) and Kristoff out of harms way. Mary Margaret and David are behind bars and Kristoff is handcuffed to a desk. They can’t physically hurt each other -- but they can verbally.

Sneak Peek #2

Regina’s (Lana Parrilla) plan to seal herself in her vault worked great. She was locked away when the spell hit, however photos show that she’ll break out. How? “Once Upon a Time” viewers will have to wait and see, but the clip shows that the Storybrooke residents won’t be dealing with Regina when she does manage to get loose. They’ll be fighting the Evil Queen.

The sneak peek videos aren’t the only things that fans can check out ahead of time. Series co-creator Adam Horowitz released two script teases from “Shattered Sight”:

What do you think will happen in Season 4, episode 11 of “Once Upon a Time”? Watch “Shattered Sight” when it airs on ABC on Sunday, Dec. 7 at 8 p.m. EST.