Check out this teaser trailer for Season 4 and tune in to the season premiere SUNDAY, SEPTEMBER 28 8|7c.
Elsa Comes to Storybrooke|A mysterious woman emerges from the portal that Emma used to return home.|A glistening, icy figure emerges from the time portal that Emma used to return to Storybooke. The woman stretches out her arm to create icicles around her, and as she walks away, she leaves the ground beneath her frozen. From Once Upon a Time Season 3 finale, "There's No Place Like Home."
WATCH: On the Once Upon a Time season finale, Frozen's Elsa traveled through the time portal to Storybrooke.