In this the first part of a double episode, everyone in Storybrooke joins Mary Margaret and David as they prepare to celebrate the birth of Emma's brother but the time traveling portal that Zelena created before her demise comes to life, and takes Emma and Hook back to the Enchanted Forest before the events of the original curse. Written by
Did You Know?
During Emma's flash back a child is handed a Mickey Mouse doll. This is the very first reference, physical or implied, to him in all 3 seasons despite the series being based on Disney characters. See more
References Back to the Future