: The quest takes the family to unexplored underwater territories where they face escalating dangers while uncovering the history of the "Lemurians" and their technology. Series Production Details Episodes : Season 4 consists of 13 episodes .
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" Grad - 4. sezona
The overarching narrative of Season 4 centers on discovering new evidence that suggests their grandparents, who vanished years earlier, might still be alive. This leads to several key plot points: : The quest takes the family to unexplored