Dark Waters (Once Upon a Time) is to take Snow's heart. The Land of Untold Stories is revealed to be the Mysterious Island from the book as the same name. The "Nautilus" is based on the submarine from "Twenty Thousand Leagues Under the Sea". Captain Nemo based on the protagonist from Jules Verne's novel "Twenty Thousand Leagues Under the Sea". Hook refers to the giant squid that attacks him as a kraken. The kraken is a legendary sea monster of giant size that is said to dwell off the coasts of Norway and Greenland. The episode posted its lowest numbers so far in the series, as
Voyage to the Bottom of the Sea (novel) Voyage to the Bottom of the Sea (novel) Voyage to the Bottom of the Sea is a science-fiction novel written by Theodore Sturgeon and first published in 1961 by Pyramid Books. Sturgeon wrote the novel from the screenplay that Irwin Allen and Charles Bennett wrote from an original story written by Irwin Allen. The movie also inspired a television series that ran for four years on ABC. Under the command of Captain Lee Crane and with Admiral Harriman Nelson, Vice-Admiral B. J. Crawford, Congressman Llewellyn Parker, and psychologist Susan Hiller aboard, the nuclear-powered submarine USOS. "Seaview" goes under the Arctic