In part 2, Hook tries to stop Emma from giving up her powers.
In a special two-hour episode, The Snow Queen attempts to pit Anna and Elsa against each other and Regina's quest goes unexpectedly.
Emma captures the Snow Queen and Ingrid discovers her ice powers.
Emma has no memory of the snow queen ever being her foster mother.
Regina teams up with Emma to search for Snow Queen; Mary Margaret and David prepare for date night.
Hook asks Mr. Gold to reattach his hand before he goes on a date with Emma.
The town blames Elsa when a spell is cast on Marian; Mary Margaret struggles to find balance.
Startled by Emma, Elsa accidentally traps both of them inside an ice cave.
In the season premiere, Elsa finds herself in Storybrooke.
ABC invites new and devoted "Once Upon a Time" viewers to take another look at this popular fantasy series in anticipation of the exciting fourth season premiere.