Everyone is still reeling from returning to Storybrooke without their memories of their time in Camelot, and Emma turning into the Dark One. Hook refuses to give up on Emma and even seeks counsel from Belle about how she reached Rumpelstiltskin when she was with him and he was the Dark One.
As everyone struggled to see Emma as the Dark One, the audience also saw the story flashback to Camelot after Arthur (Liam Garrigan) welcomes everyone into the castle walls. Arthur introduces them to his queen Guinevere (Joana Metrass) and tells the group they have been expecting them for a decade as Merlin prophesized it. When Hook tries to blow off the ball Arthur suggests to search for Merlin, Arthur takes them to a huge tree. He tells them that Merlin is stuck in the tree and only the Savior can release him.
Arthur asks who is the Savior and Regina controls Emma as she says she is the Savior.
At the ball, Regina is interrupted from her dance with Robin by one of the knights. It is then the knight reveals he knows Regina is the Evil Queen because when he was a boy she burnt down his village. He tries to kill her but Robin steps in and the knight stabs Robin just before Davis kills him.
Distraught, Regina tries to save Robin but realizes she can’t. Emma steps in and saves Robin.
Back in Storybrooke, in Robin’s encampment, Robin is taken away by a wooded figure. Belle discovers it is something called “Fury” and it is sent by death when magic needs to be repaid with a life.
Regina is determined to save Robin and confronts the Fury. She offers her life for Robin’s but then Mary Margaret, David and Grumpy grab hands with her and expel the Fury, sending death away.
Extra Notes: Henry has his first crush. Arthur, Guinevere and many members of Camelot traveled to Storybrooke as well.
One last note: The Rumpelstiltskin inside Emma’s head tells her she can do what no other Dark One has done — she can make Excalibur whole again and snuff out the light. She tries to pull the sword from the stone but learns she must first pay a price.
A bonus note: At least in Once Upon a Time, Arthur and Guinevere stay together.