: The Nektons follow a global pattern involving a massive, fast-moving Nautilus creature. It is believed this creature holds a "key" necessary to restore balance to the world's oceans.

: In the season finale, titled "The Inside Story," the family makes a major breakthrough regarding the Nautilus's true purpose and its connection to their grandparents' disappearance.

The animated series (known in some regions as Grad or Dubina ) focuses its fourth season on a high-stakes quest involving the Nekton family's search for their long-lost grandparents. The Season 4 "Deep Story"

: The season was a co-production involving companies from Australia, the UK, and Singapore.

The Inside Story | The Deep Season 4 Ep 13 | HD Full Episode