Once Upon A Time Season 5 Episode 20: Firebird Sneak Peeks

ABC has released 2 clips from this Sunday's "Firebird" episode of Once Upon a Time.

In the first clip, Hades (Greg Germann) does something rare and remarkable. He asks for help. In the following clip, "Hades is visited by Gold (Robert Carlyle) and Pan who have Zelena (Rebecca Mader) in tow. When Gold proves he has leverage over him, Hades rips up the contract in order to get Zelena back."

Watch the sneak peeks in the videos below.

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.

The episode was written by Jane Espenson and directed by Ron Underwood.

"Firebird" episode of Once Upon a Time will air Sunday, May 1 at 8:00 p.m. EDT on ABC.