The Nautilus is a submarine that belongs to Captain Nemo.
- It is based on Nemo's submarine, the Nautilus, from the stories Twenty Thousand Leagues Under the Sea and The Mysterious Island.
- The Nautilus relies on kraken blood in order for it to travel between realms.
- S6, E06: "Dark Waters"
- S6, E14: "Page Twenty-Three"
- S6, E15: "A Wondrous Place"