Season 4
13 episodes · first aired 2022-05-30
| Still | # | Title | Overview | Air date | Rating |
|---|---|---|---|---|---|
 | 01 | The Hole Truth 2022-05-30 | Ant and Fontaine realise that their grandparents found Lemuria before them - but where are they now? The Nektons follow the trail they left but run into giant, predatory Sand Strikers. Was this the fate of their grandparents? | 2022-05-30 | 5.5 |
 | 02 | The Biggest 2022-05-31 | Ant searches a deep chasm for clues to his grandparents' fate but is stunned to find Mad Madeline there. She has been looking for the biggest sunken treasure ever, but all she has managed to find is the biggest monster. | 2022-05-31 | 5.5 |
 | 03 | Little Problems 2022-06-01 | Three baby Monumential turtles hatch, and they are the size of city blocks. The playful babies accidentally sink a fishing trawler. Can the Nektons wrangle these creatures before they sink even more ships? | 2022-06-01 | 3.0 |
 | 04 | The Lead 2022-06-02 | 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? | 2022-06-02 | 5.5 |
 | 05 | AWOL 2022-06-06 | A mysterious dolphin in a sophisticated electronic harness zaps all the Rover's power. Ant and Fontaine manage to remove the harness, but can they rehabilitate this cybernetic dolphin to survive in the wild? | 2022-06-06 | 5.5 |
 | 06 | Deceptive Appearances 2022-06-07 | Mad Madeline steals the dangerous Sceptre of Queen Dorius. | 2022-06-07 | 5.5 |
 | 07 | Glass Houses 2022-06-08 | The Nektons help locate a legendary Singaporean glass cabinet. However, they discover it is guarded by a terrifying and familiar creature. | 2022-06-08 | 5.5 |
 | 08 | Unidentified Floating Objects 2022-06-09 | The Nektons are busy recovering sunken shipping containers, so when Bethany the fish finds herself in danger, only Jeffrey can save her. | 2022-06-09 | 5.5 |
 | 09 | At the Bottom of the Gyre 2022-06-13 | 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. | 2022-06-13 | 5.5 |
 | 10 | Walking with Fish 2022-06-14 | 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? | 2022-06-14 | 3.0 |
 | 11 | Getting Warmer 2022-06-15 | 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? | 2022-06-15 | 5.5 |
 | 12 | The Big Clue 2022-06-16 | 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? | 2022-06-16 | 5.5 |
 | 13 | The Inside Story 2022-06-20 | A submarine is trapped in an astonishing location. The Nektons launch an elaborate and dangerous rescue mission to save the people inside. Could it be their missing grandparents? | 2022-06-20 | 5.5 |
Ratings shown are community scores. Once OMDB is wired, these become per-episode IMDB values.