Jack and Emilia investigate a series of shipwrecks supposedly caused by a sea monster.
Tropes featured in this episode:
- Anachronism Stew: Nardo manages to invent the torpedo 65 years ahead of Real Life.
- Bond Villain Stupidity: While Nardo is quick to demand they're executed, Jack and Emilia manage to buy a little time by asking for an introduction.
- Distinction Without a Difference: Jack questions Emilia on her belief that the explanation can either be a sea monster or a giant squid and how they are any different.
- Famous Ancestor: Nardo da Vinci is descended from the famed Leonardo da Vinci, his aspirations being to surpass him.
- Gasshole: Captain Blackbeard farts with the force of a sonic boom.
- Mask of Sanity: While Nardo frames himself as an Evil Genius and a pragmatist, he will sometimes go off into his own little world when he gets worked up.
- Not Quite Dead: The end of the epeisode reveals that Blackbeard and Nardo survived the explosion and are fighting over control of the sub.
- Pragmatic Villainy: Nardo is quick to kill any witnesses, and would have had Jack, Emilia and Blackbeard killed on the spot if they didn't pick at his Pride.
- Riding the Bomb: Blackbeard, of all people.
- Surrounded by Idiots: Nardo's mooks have a habit of overlooking a lot of things, much to his chagrin.
- Wicked Cultured: Nardo is a genius that listens to classical music in his submarine.
