The fifth episode of "Once Upon a Time," "Breaking Glass," will feature frenemies and co-madres Emma and Regina as they team up to search for the Snow Queen, who has frozen Marian and framed Elsa, someone else who has the same power as her.

"Breaking Glass," which was written by Kalinda Vazquez and Scott Nimerfro, and directed by Alrick Riley, offers a glimpse into the ever-complex relationship between the Evil Queen and Savior. Sidney, who Regina once again imprisoned in her mirror, helps Regina discover the Snow Queen's whereabouts and he agrees to lead them to her location.

In another part of Storybrooke, Belle babysits baby Neal. And a nervous Mary Margaret and David prepare for their very first date night away from their newborn child, but they get sidetracked and they're forced to track down Will Scarlet, who's escaped from the town jail. Also, Elsa spots Anna in the Storybrooke woods.

The episode will also feature flashbacks that don't involve a "Frozen" character for a change. In a flashback scene, a young Emma (portrayed by Abby Ross) befriends a kindred spirit who, like her, is a runaway. The flashback may expose a deeper connection between her and the Snow Queen.

"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.

Giancarlo Esposito is guest-starring as Sidney/Magic Mirror. Also, Georgina Haig will star 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, and Elizabeth Mitchell as the Snow Queen.

ABC Television Network will air on Sun Oct. 26 at 8:00 PM.