Once Upon a Time/A Curious Thing
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A Curious Thing is the nineteenth episode of the third season of Once Upon a Time and the sixty-third episode overall.
Starring: Ginnifer Goodwin (Snow White / Mary Margaret Blanchard), Jennifer Morrison (Emma Swan), Lana Parrilla (The Evil Queen / Regina Mills), Josh Dallas (Prince Charming / David Nolan), Emilie de Ravin (Belle), Colin O'Donoghue (Captain Hook), Michael Raymond-James (Neal Cassidy), Jared S. Gilmore (Henry Mills)
Guest Starring: Lee Arenberg (Grumpy / Leroy), Sarah Bolger (Princess Aurora), Beverley Elliott (Granny), Christopher Gauthier (Smee), Sunny Mabrey (Glinda), Rebecca Mader (The Wicked Witch of the West / Zelena), Sean Maguire (Robin Hood), Julian Morris (Prince Phillip)
Zelena threatens to kill Henry if Hook - whose lips have been cursed by the Wicked Witch -- doesn't proceed with kissing Emma, which will drain all of her magical powers away. Meanwhile, things begin to heat up between Regina and Robin Hood. Back in the Enchanted Forest that was during the past year, Snow and Charming go in search of Glinda, The Good Witch of the South, to see if she can help them defeat Zelena. The curse that ultimately sent the Fairy Tale characters back to Storybrooke is cast - but by an unlikely source.