Our Decay

"Our Decay" is the 104th episode of Once Upon a Time.

Summary
Emma and the others continue to search for a way to free everyone from the Underworld while, at the same time, Gold creates a portal to Storybrooke at Hades' behest, bringing over Belle, Zelena and Baby Hood. It isn't long before the Evil Queen and the Wicked Witch get into a sibling squabble, and Rumple has to deliver some shocking news to his wife that will change her life forever. Meanwhile, Snow and David hopelessly attempt to send a message to their son Neal and, in flashbacks to the land of Oz, Hades learns about a very special spell of Zelena's and decides to pay her a visit with the intention of striking an alliance. However, he finds himself with more than just a partner in crime...

Production

 * The title of this episode was officially confirmed by executive producer/co-creator Adam Horowitz, via his Twitter account, on January 17, 2016.

Gallery
Gallery of photographic stills released to promote the episode.