EMMA'S POWERS RUN AMOK AND SHE TURNS TO GOLD FOR HELP, ELSA AND ANNA'S RELATIONSHIP IS TESTED AND THE SNOW QUEEN'S AGENDA IS REVEALED, IN A SPECIAL TWO-HOUR "ONCE UPON A TIME" STARTING AT 8/7c, SUNDAY, NOVEMBER 16 ON ABC

Elizabeth Mitchell ("Lost") Guest Stars as the Snow Queen

"Smash the Mirror" - In Arendelle, when the Snow Queen tries to pit Elsa and Anna against each other and it proves more difficult than she anticipates, she takes drastic measures. Meanwhile, in Storybrooke Emma's powers are out of control and her fear of hurting loved ones pushes her away from everyone she cares about. In her confusion, Emma turns to Gold for help getting her powers under control. Gold tells her about a way to get rid of her powers altogether and Hook tries to put a stop to it. Meanwhile, Regina struggles with her plan to find the author of the storybook until her quest takes an unexpected turn. Robin Hood recruits Will Scarlet to assist him on a mission and Mary Margaret and David search for Emma in this special, two-hour "Once Upon a Time" airing SUNDAY, NOVEMBER 16 (8:00--10:01 p.m., ET) on the ABC Television Network.

"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 Nolan, Emilie de Ravin as Belle, Colin O'Donoghue as Hook, Jared S. Gilmore as Henry, Michael Socha as Will Scarlet and Robert Carlyle as Rumplestiltskin/Mr. Gold.

Guest stars include Georgina Haig as Elsa, Elizabeth Lail as Anna, Scott Michael Foster as Kristoff, Timothy Webber as Apprentice, Raf Rogers as Arendelle Servant, Lee Page as Arendelle Guard #1, Patrick Roccas as Arendelle Guard #2, Sean Maguire as Robin Hood and Elizabeth Mitchell as Ingrid/Snow Queen.