Dark Waters

"Dark Waters" is the sixth episode of Season Six of ABC's Once Upon a Time. It was written by Andrew Chambliss & Brigitte Hales, and directed by Robert Duncan. It will be the one-hundredth and seventeenth episode of the series overall, and will premiere on October 30, 2016.

Synopsis
Emma tries to convince Aladdin to work with Jasmine to help Agrabah, while Regina teams up with Snow and David to free Archie from Zelena. The Evil Queen sows suspicion between Henry and Hook, even as Mr. Gold reminds her of his most important lesson. Meanwhile, in the past, Hook finds himself kidnapped by the mysterious Captain Nemo and held captive inside his legendary submarine, the Nautilus.

Starring

 * Ginnifer Goodwin as Snow White/Mary Margaret Blanchard
 * Jennifer Morrison as Emma Swan
 * Lana Parrilla as Evil Queen/Regina Mills/Evil Queen (Serum)
 * Josh Dallas as Prince Charming/David Nolan
 * Emilie de Ravin as Belle/Belle French
 * Colin O'Donoghue as Hook
 * Jared S. Gilmore as Henry Mills
 * Rebecca Mader as Zelena
 * Robert Carlyle as Rumplestiltskin/Mr. Gold

Guest Starring

 * Raphael Sbarge as Jiminy Cricket/Archie Hopper
 * Karen David as Princess Jasmine
 * Deniz Akdeniz as Aladdin
 * David Avalon as Doc/Doc
 * Faran Tahir as Captain Nemo
 * Nick Eversman as First Mate
 * Corey Schmitt as Second Mate

Trivia

 * -|Production Notes=

Production Notes

 * The title of this episode was revealed by Adam Horowitz via his Twitter account on August 23, 2016.
 * The episode's title appears in a passage in chapter 3 of the second part of Jules Verne's novel Twenty Thousand Leagues Under the Sea, in which the first-person narrator Professor Pierre Aronnax describes, "Under these dark waters there stretched the bank of shellfish, an inexhaustible field of pearls more than twenty miles long."