Episode 1 launches the big mystery: "We look into why Peter Pan targets Henry (Jared Gilmore)," says exec producer Adam Horowitz. While hunting for her son, Emma (Jennifer Morrison) and Hook (Colin O'Donoghue) may, er, hook up. Notes exec producer Eddie Kitsis: "He has his sights set on her." How did Hook become a pirate anyway? And Ariel (JoAnna Garcia Swisher) a mermaid? Who is Tinker Bell (Rose McIver)? Flashbacks tell all, plus more on Snow and Charming (Ginnifer Goodwin, Josh Dallas).