ARIEL TRAVELS TO STORYBROOKE TO CONTACT BELLE AND FIND A HIDDEN ARTIFACT THAT CAN HELP TAKE DOWN PAN, AND EMMA, NEAL AND HOOK ATTEMPT TO LOCATE DARK HOLLOW - WHERE PETER PAN'S SHADOW DWELLS - IN ORDER TO CAPTURE IT, ON ABC'S "ONCE UPON A TIME"

JoAnna Garcia Swisher Guest Stars as Ariel

"Dark Hollow" - Mr. Gold and Regina send Ariel back to Storybrooke with an item that will allow Belle to locate a hidden artifact that could help take down Pan. But unbeknownst to them, two men have broken into the town with the intent to stop them - at all costs. Meanwhile, Emma, Neal and Hook attempt to find Dark Hollow, where Peter Pan's shadow dwells, in order to capture it, and Mary Margaret is upset with David for keeping his poisoning a secret from her, on "Once Upon a Time," SUNDAY, NOVEMBER 10 (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, 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, Keegan Connor Tracy as Mother Superior/Blue Fairy, Raphael Sbarge as Dr. Hopper/Jiminy Cricket, Beverley Elliott as Granny, David-Paul Grove as Doc, Gabe Khouth as Sneezy, Faustino Di Bauda as Sleepy, Jeffrey Kaiser as Dopey, Michael Coleman as Happy, Mig Macario as Bashful, Robbie Kay as Pan, JoAnna Garcia Swisher as Ariel, Rose McIver as Tinker Bell, Peter Croft as Felix, Freya Tingley as Wendy, James Immekus as keychain and Matt Kane as glasses.

"Dark Hollow" was written by Kalinda Vazquez & Andrew Chambliss and directed by Guy Ferland.

"Once Upon a Time" is broadcast in 720 Progressive (720P), ABC's selected HDTV format with a 5.1 channel surround sound. A TV parental guideline will be assigned closer to the airdate.

For more information on "Once Upon a Time," visit ABC.com/Once