In "Into the Deep," Cora does everything in her power to steal the compass away from Mary Margaret and Emma in her quest to find the entrance to Storybrooke.
Meanwhile, in order to protect Henry from further danger, Regina and Mr. Gold must put David's life in jeopardy in an attempt to put him in contact with Mary Margaret across the lands to give her vital information that could help her and Emma return through the portal back to Storybrooke.
Watch a few sneak peek videos below:
ONCE UPON A TIME stars Ginnifer Goodwin as Snow White/Mary Margaret, Jennifer Morrison as Emma Swan, Lana Parrilla as Evil Queen/Regina, Josh Dallas as Prince Charming/David, Emilie de Ravin as Belle, Jared S. Gilmore as Henry Mills, Meghan Ory as Red Riding Hood/Ruby, and Robert Carlyle as Rumplestiltskin/Mr. Gold.
Guest starring are Barbara Hershey as Cora, Colin O'Donoghue as Hook, Beverley Elliott as Granny, Sarah Bolger as Aurora and Jamie Chung as Mulan.
"Into the Deep" was written by Kalinda Vazquez & Daniel T. Thomsen and directed by Ron Underwood.