The Deep - Season 4 (2022)

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?

A mysterious dolphin in a sophisticated electronic harness zaps all the power from the Rover. Ant and Fontaine manage to remove the harness, but can they rehabilitate this cybernetic dolphin to survive in the wild?

A clever machine Ant created to clean up a vast oceanic rubbish dump, has been eaten by a huge creature. Can the Nektons save Ant's machine, save the creature, and try to save the planet all in one day?

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Ant and Fontaine rescue a Polar Bear from the middle of the ocean. When they bring it on board, they realize she's close to giving birth. Can the Nektons move her to a safer place in time?

The Bajau Laut people are sea nomads living in the South China Sea, and they're hiding a secret. When Ant and Fontaine discover the secret, they're determined to help them. But how do you find a fish that walks?

Fontaine's amazed when Smiling Finn calls her and tells her he's detected a signal from her Grandparents' missing submarine. Is this a joke-an elaborate scam-or something even more amazing?

The Nektons help locate a legendary Singaporean glass cabinet, but discover it's guarded by a terrifying and familiar creature. Last time, they barely escaped with their lives. Will they be as lucky this time around?

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?

Devil Daniels is copying all Ant's ideas. He even has his own pet fish-Bethany. The Nektons are busy recovering sunken shipping containers, so when Bethany finds herself in danger, only Jeffrey can save her.