"Once Upon a Time" stars Ginnifer Goodwin as Snow White/Mary Margaret, Jennifer Morrison as Emma Swan, Lana Parrilla as the Evil Queen/Regina, Josh Dallas as Prince Charming/David, Emilie de Ravin as Belle, Colin O'Donoghue as Hook, Michael Raymond-James as Baelfire/Neal Cassidy, Jared S. Gilmore as Henry Mills and Robert Carlyle as Rumplestiltskin/Mr. Gold.
Guest starring are Lee Arenberg as Leroy/Grumpy, Beverley Elliott as Granny, Sarah Bolger as Aurora, Rebecca Mader as Zelena, Sunny Mabrey as Glinda, Julian Morris as Prince Phillip, Sean Maguire as Robin Hood and Christopher Gauthier as Smee.
"A Curious Thing" was written by Edward Kitsis & Adam Horowitz and directed by Ralph Hemecker.