Plot summary
During the first Dark Curse, Captain Nemo abducts Hook and invites him to join the crew "family" of his submarine, Nautilus, in their quest for the "Mysterious Island", which is the Land of Untold Stories. Hook discovers the first mate is his half-brother, Liam, and decides to leave to avoid confrontation; but Liam attacks him, instead mortally wounding Nemo, who steps in. In the present, Archie is freed. Henry confronts Hook over lying about the shears, and Liam imprisons them on Nautilus. Hook opens up and Henry accepts him as family; they save each other and dispose of the shears. Modern medicine saves Nemo; he, Liam, and Hook make amends. Emma and Aladdin discuss being a Savior. Jasmine reveals that Agrabah vanished. Snow supports Belle at her ultrasound. The Evil Queen seduces Gold and offers the retrieved shears in exchange for help taking Snow's heart.
Credits
Adapted from Wikipedia contributors, Once Upon a Time season 6. HTML formatting and reference markers removed.