EMMA FINDS COMMON CAUSE WITH GIDEON, AND HENRY'S POWERS GO HAYWIRE, AS HOOK GETS BACK TO HIS ROOTS LOOKING FOR A WAY HOME TO STORYBROOKE, ON ABC'S 'ONCE UPON A TIME'

Jaime Murray Returns as the Black Fairy and Patrick Fischler Returns as the Author/Isaac

"Mother's Little Helper" - Gold and Belle convince Emma to help Gideon, explaining that together they can stop the Black Fairy. Henry experiences a disorienting shift in his powers that forces Regina to seek counsel from the previous Author. Meanwhile, in Fairy Tale Land, Hook attempts to win the assistance of an old adversary by betting his most prized possession on a game of cards. And, in a flashback, the Black Fairy tortures young Gideon in hopes of molding him into the perfect apprentice, on "Once Upon a Time," SUNDAY, APRIL 9 (8:00-9:00 p.m. EDT), 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, Jared S. Gilmore as Henry Mills, Rebecca Mader as the Wicked Witch/Zelena and Robert Carlyle as Rumplestiltskin/Mr. Gold.

Guest starring are Patrick Fischler as the Author/Isaac, Giles Matthey as Gideon, Charles Mesure as Blackbeard, Jaime Murray as the Black Fairy, Ingrid Torrance as Severe Nurse, Peter Marcin as Chief, Anton Starkman as Ten-year-old Gideon, Mason McKenzie as Roderick, Grayson Gabriel as Adult Roderick, Rohan Campbell as Male Miner and Eleanor Jane as Nurse.