Regina wrestles with dealing with Marian's arrival in Storybrooke.
Elsa endangers Emma’s life inadvertently, as they both get trapped inside an ice cave.
Elsa is blamed by the residents of Storybrooke as Marian is under an icy spell.
Hook tells Gold to reattach his hand in order to go on a date with Emma.
After Sidney finds the location of the Snow Queen, Regina unwillingly joins forces with Emma to find her.
Emma is resolute to know the Snow Queen's scheme after learning that she used to be her foster mother.
The relationship between Regina and Robin becomes too complicated.
Past flashbacks reveal that the Snow Queen has tried to set Elsa and Anna against each other.
Everyone attempts to prevent Emma from letting go of her powers, and Robin finds a lead that might lead Regina to the author of the storybook.
Belle and the fairies set out to have an antidote that might save Storybrooke from the Spell of Shattered Sight.
Emma and Elsa try to free themselves and defeat the Snow Queen as soon as possible.
After the Snow Queen's spell, Emma tries to find a portal to help Elsa, Anna, and Kristoff get back to Arendelle.
Hook and Belle set out to free the fairies from the Sorcerer’s hat, while Gold and Ursula ask Cruella to team up with them.
Regina and Henry seek the assistance of Marco and Pinocchio to locate the Author.
Hook seeks Belle's help, while Henry gets closer to finding the Author.
Hook wants to have a deal with Ursula, and it becomes clear that they shared a troubled past.
Storybrooke is put to sleep by Maleficent to steal the page that holds the Author captive.
Regina is worried about Robin, after he teams up with the Author, while Robin's past is revealed.
Regina’s mission to go to New York to save Robin from Zelena is hindered as Cruella abducts Henry.
As Emma comes to learn that Maleficent's daughter is her childhood friend Lily, she joins Regina to locate her.
Maleficent and Lily are reunited with Emma's help, while Lily is determined to take revenge against Mary Margaret and David.
As the Author teams up with Gold, the fate of the people of Storybrooke becomes at stake.
Emma, her parents, Hook and Regina join forces to defeat the Author and Gold.