Once Upon a Time (2011)

S3E21 Snow Drifts

As Mary Margaret and David honor their son’s naming at a coronation in Granny's Diner, Emma and Hook get swept into Zelena's time portal, landing in the Enchanted Forest from the past. In their attempt to find a way home, they must tread carefully to avoid making any changes that could impact the lives of their loved ones—and potentially erase their own existence as well.