EMMA AND HOOK'S LOVE FACES THE ULTIMATE TEST ON ABC'S "ONCE UPON A TIME"

Greg Germann Guest Stars as Hades, Rya Kihlstedt as Cleo and Robbie Kay as Peter Pan

"Firebird" - Hades turns to the heroes to ask for help with getting Zelena back from Rumplestiltskin and Peter Pan. In return, he offers to take all their names off their tombstones. However, when Hook is still unable to leave, he and Emma must journey into the depths of the Underworld. Meanwhile, Cruella De Vil is determined to keep the heroes trapped in the Underworld. In flashbacks, Emma searches for answers about her family and makes an unexpected friendship on "Once Upon a Time," SUNDAY, MAY 1 (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, Sean Maguire as Robin Hood, Rebecca Mader as the Wicked Witch/Zelena and Robert Carlyle as Rumplestiltskin/Mr. Gold.

Guest stars include Emma Caulfield as the Blind Witch, Robbie Kay as Peter Pan, Victoria Smufit as Cruella De Vil, Rya Kihlstedt as Cleo, Geoff Gustafson as Stealthy, Bronwen Smith as Cashier, Max Chadburn as Tasha and Greg Germann as Hades.