6x21 Emma & Hook #2 

THE BLACK FAIRY'S CURSE LANDS OUR HEROES IN FAIRY TALE LAND WITH LITTLE HOPE OF RETURNING HOME, AND EMMA IS IN THE FIGHT OF HER LIFE, ON THE SEASON FINALE OF ABC'S 'ONCE UPON A TIME'
"The Final Battle Part 1 & 2" - Henry awakens to a cursed Storybrooke and discovers Emma has been in the mental hospital, and the Black Fairy is the new mayor. Henry attempts to help Emma regain her memory while Gold tries to find out what has really happened to Belle. Meanwhile, Snow, Charming, Regina, Zelena and Hook are trapped in a crumbling Fairy Tale Land and desperately try to figure out a way to be reunited with Emma and Henry, on season finale of "Once Upon a Time," SUNDAY, MAY 14 (8:00-10:00 p.m. EDT), on The ABC Television Network.