Nine weeks earlier in New York City, Robin and Marian head to Baelfire's old apartment where they run into Mr. Gold. Gold has a heart attack and is rushed to the hospital. His heart has been poisoned by all of his dark deeds and he needs magic to save himself. The only magic in New York City is the Elixir of the Wounded Heart which Selena moved to this realm. Robin steals it for him in order to be get Baelfire’s apartment for his family. But when Gold takes the Elixir, it doesn’t work for him. Turns out Marian switched the vials, but Marian is not Marian. Selena was transported to the Enchanted Forest when Emma and Hook went through the portal. When she realized that Emma was determined to bring Marian back to Storybrooke, she killed Marian and took her place. Doing so has allowed her to steal Regina’s true love and happy ending.
Gold needs Regina’s help to turn Emma’s heart dark. When Regina refuses he lets her call Robin in NYC but she gets Selena on the phone. Selena tells her the truth. Gold tells Regina that if she doesn’t help him with the author and Emma, he will have Selena kill Robin.

Watch Once Upon a Time Season 4 Episode 18 Online here at TV Fanatic.