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
Sphere (novel) original code, Johnson realizes by transposition the entity's name should be "Harry" (Adams). Johnson hypothesizes that the sphere is an object which allows a person's subconscious thoughts to manifest in reality, and Harry Adams has acquired the power through entering it. (Confirmed by his childhood fear of squid, especially the giant squid in the novel "Twenty Thousand Leagues Under the Sea", manifested in the form of a vast number of small squid and later a giant squid that attacks the DH-8 Habitat.) Johnson and Halpern sedate Adams and wait for contact to be re-established with the surface, but the manifestations