VIDEO: Sneak Peek - Look Who's Back on ABC's ONCE UPON A TIME

On the next episode of ABC's ONCE UPON A TIME titled "Heart of Gold" - Look who's back - and she's more powerful than ever! Once Upon a Time returns Sunday April 12th on ABC. Get a sneak peek below!

Master storytellers Edward Kitsis and Adam Horowitz ("Lost," "Tron: Legacy") invite everyone to join Emma Swan, Snow White, Prince Charming, The Evil Queen, Hook and all the other resident fairytale characters as they prepare to defend themselves against a magical force from the past that's too unpredictable even for Rumplestiltskin - Elsa, the Ice Queen from Arendelle.

Once Upon a Time" stars Ginnifer Goodwin as Snow White/Mary Margaret, Jennifer Morrison as Emma Swan, Lana Parrilla as the Evil Queen/Regina, Josh Dallas as Prince Charming/David Nolan, Emilie de Ravin as Belle, Colin O'Donoghue as Hook, Jared S. Gilmore as Henry, Michael Socha as Will Scarlet and Robert Carlyle as Rumplestiltskin/Mr. Gold.