Watch fans react to the shocking reveal of Zelena's true identity in this episode highlight: Once Upon A Time 3x13 - "Witch Hunt" Reaction Part 1/2 After Show Reacts YouTube• Oct 31, 2020

She found the intruder in her own bedchamber. It wasn't a monster or a king, but a woman with a chillingly familiar smile and skin that shimmered with a sickly green hue.

The residents of Storybrooke woke up with a hollow ache in their chests. They were back in Maine, but a full year of their lives had been wiped clean—a blank canvas where memories should have been. Emma Swan, now the Sheriff again, looked at the townspeople and saw only fear.

As the town gathered, a hooded figure lurked in the shadows. Emma gave chase, her heart pounding against her ribs. She cornered the figure in the woods, but instead of a witch, she found a flying monkey—a winged beast that shrieked before transforming into a cloud of green smoke. The Green Shadow

Back in the Enchanted Forest—the year they couldn't remember—Regina and Robin Hood had formed an unlikely alliance. To find out who had taken over her castle, Regina used her magic to bypass the protective shield, only to find the halls draped in emerald green.

The episode ( Season 3, Episode 13 of Once Upon a Time ) centers on the arrival of a new, formidable threat in Storybrooke and the Enchanted Forest: Zelena , the Wicked Witch of the West.

"You're late for tea, sister," Zelena had said, her voice dripping with mock affection. The revelation hit Regina like a physical blow: she wasn't the only daughter of Cora. She had a sister, and that sister had spent a lifetime nursing a grudge as vast as the Western Woods. The Trap in Storybrooke

The episode ends with a chilling realization. Zelena isn't hiding in the woods; she’s hiding in plain sight. She introduces herself to a pregnant Mary Margaret as " Zelena ," a friendly midwife ready to help with the new baby.