5x23 Emma & Hook #1 

SEASON FINALE
REGINA WRESTLES WITH HER INNER DEMONS AS SHE REELS FROM THE LOSS OF ROBIN HOOD WHEN HENRY GOES ON A DANGEROUS ROGUE MISSION, AND A PORTAL IS OPENED INTO A STRANGE AND TWISTED REALM, ON THE TWO-HOUR SEASON FINALE OF ABC'S 'ONCE UPON A TIME'
"Only You" - In the first hour of the special two-hour season finale, Regina reels from the death of Robin Hood, and everyone tries to give her room to grieve, but when the heroes discover Gold has stolen Hades' Olympian Crystal and tethered all of Storybrooke's magic to it, they set out to stop him. Henry decides he no longer can stand all the pain magic has caused his family, so he goes rogue, with Violet in tow, to destroy magic once and for all. Meanwhile, Zelena, Snow, David and Hook attempt to open a portal that will return Merida and the other Storybrooke guests to their homes, but things go awry, and the group winds up in a deranged new world.
"An Untold Story" - In the second hour, with the possibility of magic being destroyed and the fate of Storybrooke hanging in the balance, it's a race for Emma and Regina to track down Henry before Gold can find him first. Regina continues to struggle with her frustrations over her former evil-self and, elsewhere, Snow, David, Hook and Zelena are imprisoned and must contend with very two very disturbed individuals that may give Gold a run for his money.
The season finale of "Once Upon a Time" airs SUNDAY, MAY 15 (7:00-9:00 p.m. EDT), on the ABC Television Network.