Fontaine is amazed when Smiling Finn tells her that he has detected a signal from her grandparents’ missing submarine. Is this a joke, an elaborate scam, or something even more amazing?

Three baby monumental turtles hatch, and they are the size of city blocks! The playful babies accidentally sink a fishing trawler! Show more

Ant searches a deep chasm for clues to his grandparents' fate but is stunned to find Mad Madeline there! Show more

Does Dolos really have a lead on finding Ant’s grandparents? Or is he leading the Nektons into a dangerous chasm between moving tectonic plates for nefarious purposes?

The Nektons are busy recovering sunken shipping containers, so when Bethany the fish finds herself in danger, only Jeffrey can save her!

Mad Madeline steals the dangerous Sceptre of Queen Dorius.

A mysterious dolphin in a sophisticated electronic harness zaps all the Rover's power! Show more

Ant and Fontaine realise that their grandparents found Lemuria before them - but where are they now? Show more

Ant has created a clever machine to clean up a vast oceanic rubbish dump. However, when the machine is been eaten by a huge creature, it's up to the Nektons to save it.

The Nektons launch an elaborate and dangerous rescue mission to save the people inside a trapped submarine. Could it be their missing grandparents?

Ant and Fontaine rescue a polar bear from the middle of the ocean. However, when they bring her onboard, they realize she is close to giving birth! Can the Nektons move her to a safer place in time?

Ant and Fontaine discover the secret of the Bajau Laut people, a tribe of sea nomads living in the South China Sea. The pair are determined to help them - but how do you find a fish that walks?

The Nektons help locate a legendary Singaporean glass cabinet. However, they discover it is guarded by a terrifying and familiar creature.