Once Upon a Time/Siege Perilous
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Siege Perilous is the third episode of the fifth season of Once Upon a Time, and the ninety-first 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), Jared S. Gilmore (Henry Mills), Rebecca Mader (Wicked Witch of the West / Zelena), Sean Maguire (Robin Hood)
Heroes in Camelot work to free Merlin; when David goes on a quest to retrieve a magical relic, Arthur insists on coming along.