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
20,000 Leagues Under the Sea (1954 film) Will Smith for the Captain Nemo role, but he has reportedly turned down the part. As a second possible choice, McG had mentioned Sam Worthington, whom he worked with on "Terminator Salvation", though they did not ever discuss it seriously. The project was later shelved in November 2009 with McG backing out of directing. During the 2010 San Diego Comic-Con, director David Fincher announced plans of directing "20,000 Leagues Under the Sea" for Walt Disney Pictures based on a script by Scott Z. Burns. While Fincher was wrapping up "The Girl with the Dragon Tattoo" (2011), it was speculated that