Gideon wants the savior to help him kill his grandmother, the Black Fairy. Naturally, Emma's first response is no way. But Rumple's son can be rather persuasive when he needs to be. Or, he'll threaten her. Again.
Frozen fever swept into Storybrooke when Emma and Killian accidentally transported an imprisoned Elsa to Storybrooke. The queen was on a mission to save her sister. With some help from the savior, the sisters were reunited in a beautiful moment.