Viewers learned something both intriguing and scary on Once Upon a Time Season 4 Episode 2:
Elsa is not the person in Storybrooke capable of forcing everyone to chill out.
Toward the conclusion of this latest installment, we didn't just welcome Elizabeth Mitchell to the ABC drama... we learned that the beloved former Lost star is now on board as The Snow Queen. Yikes!
On next Sunday's Once Upon a Time Season 4 Episode 3 (titled "Rocky Road"), Mitchell will truly make her presence felt, putting a curse on the town and watching as everyone blames Elsa for it.
She'll also taunt her Frozen rival, as teased in the following trailer.
Check it out now and remember to go watch Once Upon a Time online via TV Fanatic if you need to stay current on all the latest happenings and storylines.