They say, "Wicked always wins"—and that phrase is definitely starting to come true.

After last week's spellbinding midseason premiere of Once Upon a Time, fans were introduced to the newest, most formidable villain in fairytale history: The Wicked Witch of the West (Rebecca Mader). And now, we're about to show you Zelena's Storybrooke alter ego and what she truly looks like once you strip her of her envious green mask.

We've conjured up an exclusive sneak peek into this Sunday's all-new hour, "Witch Hunt," to give you the highly anticipated first look at the return of Dr. Whale (David Anders), Mr. Hopper (Raphael Sbarge), Belle (Emile de Ravin) and more of Storybrooke's most enchanting characters as they try to discover who cast this one-of-a-kind curse.