Mother's Little Helper

"Mother's Little Helper" is the sixteenth episode of the sixth season of the American fantasy drama series Once Upon a Time, which aired on April 9, 2017. In this episode, Gideon's past with the Black Fairy and his vengeance towards his grandmother is revealed, as Gideon blackmails Emma into defeating the Black Fairy in order to return Hook back to Storybrooke. Meanwhile, Hook teams up with Blackbeard to find a way to return, only to end up back in Neverland, whilst Regina turns to an imprisoned Isaac when Henry's powers as the Author goes awry.