The below from wiki............Lewis C..............Alice in Wonderland............



With Emma's arrival, the curse began to weaken, with clocks moving forward, crickets chirping, and Regina's apple tree showing signs of spoilage. Once the curse was broken, residents who passed the city limits found their newly restored memories of being fairy-tale characters erased; they only remembered their Storybrooke identities. Also, those who have magic powers will lose them upon leaving town, although Zelena was an exception because of her ability as a witch to travel through realms. In addition, as alluded in "The Outsider", the weakening curse resulted in individuals from the outside world entering Storybrooke; characters include the arrival of Greg Mendell (who, along with his father were witnesses to the town's "arrival" in 1983) and later Tamara (after she followed August from Hong Kong). The episode "Hat Trick" shows Wonderland of Lewis Carroll's Alice's Adventures in Wonderland. It revealed that other worlds or universes exist; in "The Doctor", Dr. Frankenstein is brought to the Enchanted Forest for a short while, and later in Storybrooke, (as Dr. Whale) he expresses concern over whether all the worlds have disappeared. It was also revealed in "An Apple Red as Blood" that it is be possible to retrieve an item from the Enchanted Forest and bring it to the present day.