With Zelena trying everything in her power to get her hands on Snow White's baby in order to go back in time and kill Princess Eva, will Regina, Emma and the rest of the Storybrooke gang be able to stop her? 

And just how much danger is Henry in now that he doesn't remember anything about his fairy tale connections?

Speaking of the fairy tale world, in the missing year it appears that Snow and Charming tracked down Glinda, the Good Wtich. Did she have any advice on how to stop her wicked counterpart?

Check out these photos from Once Upon a Time Season 3 Episode 19, "A Curious Thing," set to air Sunday, April 27 on ABC and get an idea now of what's on tap: 

Once Upon a Time Photos from "A Curious Thing"

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C. Orlando was a TV Fanatic Staff Writer. Follow her on Twitter.