REGINA RELUCTANTLY TEAMS UP WITH EMMA TO SEARCH FOR THE SNOW QUEEN, ELSA SEES ANNA IN THE STORYBROOKE WOODS, AND IN THE PAST, YOUNG EMMA BEFRIENDS A KINDRID SPIRIT, WHO, LIKE HER, IS A RUNAWAY ORPHAN, ON ABC'S "ONCE UPON A TIME"

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

Giancarlo Esposito ("Breaking Bad") Guest Stars as Sidney

"Breaking Glass" - Regina reluctantly teams up with Emma to search for the Snow Queen after Sidney, who is once again Regina's prisoner in the mirror, discovers her whereabouts and agrees to lead her to the location. With Belle babysitting baby Neal, a nervous Mary Margaret and David prepare for their first date night away from their child and find themselves on a mission to track down Will Scarlet, who has escaped from the town jail, and Elsa sees Anna in the Storybrooke woods. Meanwhile, back in the past, young Emma finds herself a kindred spirit when she befriends a girl who, like her, is a runaway orphan, on "Once Upon a Time," SUNDAY, OCTOBER 26 (8:00-9:00 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 starring are Giancarlo Esposito as Sidney/Magic Mirror, Georgina Haig as Elsa, Elizabeth Lail as Anna, Oliver Rice as King Arendelle, Pascale Hutton as Queen Arendelle, Nicole Munoz as Lily, Barclay Hope as Lily's father, Kelly-Ruth Mercier as manager, Anson Hibbert as policeman, Ilias Webb as Kevin, Abby Ross as young Emma and Elizabeth Mitchell as Snow Queen.