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.
True love always wins. But sometimes it has to fight against curses, memory loss, and a trip to the Underworld. We're partial to the first time the two were separated, and Killian traded his ship for a magic bean to New York City. He managed to convince the skeptical savior to trust him enough to take a memory potion.
Frozen overload aside, Emma and Elsa formed an amazing friendship while the queen resided in Storybrooke. Both woman understood the drawbacks of magical powers and what it felt like not to fit in. We'd love to see more of these two now that Emma's accepted her place as the savior and Elsa's regained her throne.