In a sneak peek for the next episode of Once Upon a Time season 4, see what Elsa does to the Storybrooke residents to get information about her sister.

The Once Upon a Time season 4 premiere was a huge success, bringing in high ratings and reassuring worried fans that the Frozen characters weren’t completely going to take over the show.

…Er, Elsa (Georgina Haig) does kind of take over Storybrooke in this sneak peek for episode 2 though.

Related: Once Upon a Time season 4, episode 1 recap: Rewriting history

In “White Out,” we continue where we left off last week. Elsa finds Anna (Elizabeth Lail)’s necklace in Gold’s shop, and continues to search for her sister – and she’s going to get the whole town to help her:

Do you think anyone in Storybrooke knows what happened to Anna?

Though the most likely candidates are Mr. Gold (Robert Carlyle) and Regina (Lana Parrilla), we’ve actually got our money on David (Josh Dallas).

In the episode we’ll flash back to his time as a shepherd boy, and a surprising connection to the Frozen sisters will be revealed.

Once Upon a Time season 4, episode 2 “White Out” will air Sunday night at 8/7c on ABC.

We recently posted an awesome first-look image at Prince Hans, who will be appearing in episode 3. You can also read a compilation of Once stars’ tweets about the season 4 premiere, and read our top theories for the mysterious sorcerer’s hat!