The Nektons find the Queen's sceptre. But faced with the Kraken and the Electric Ray Monumential together, can Ant make it work?

The Dark Orca pirates unwittingly steal a treasure that could awaken a Monumential.

The Nektons return to the mysterious Lemurian Gates they found previously. Exploring within, they're stunned to discover Lemuria is here.

The Nektons explore Lemuria but Fontaine realises the others are being affected by a dangerous algae. Can she find an antidote?

The Internet being down is the worst thing imaginable for Ant and Fontaine - until Ant finds the sea monster responsible for this. Can he save both?

Trying to rescue Jess Gorman in an underwater cave proves dangerous for Ant and Fontaine until a manatee comes to their aid. But is it too late?

The Rover is swallowed by a huge prehistoric shark. Will and Fontaine manage to cling to its gills just inside its mouth.

Devil Daniels insists he's relocating a dangerous killer whale. But it's a scam that turns dangerous. Our heroes need to save Ant and the whale.

Ant tries to locate a 'diamond-horned sea-unicorn' as a present for Fontaine's birthday. But Dolos and Devil Daniels are also hunting it.

The Aronnax and Alpheus's sub are trapped within a giant jellyfish. They've been eaten and the jellyfish won't let food out.

The Nektons try to save an island from the 'purple tide' that legend says will destroy everything. To save it, they need to locate the Protector.

Ant wants to go faster than the fastest fish in the sea - the sailfish. But he hasn't counted on a deadly oil spill that threatens to destroy them.

A giant, upright creature, straight out of a monster movie, walks across the ocean floor, causing havoc.

The Nektons find an amazing underwater crop circle. It's been built by a giant male puffer fish to attract a mate. Can Ant help the romance along?

The Nektons explore a floating island and find the final piece of the Ephemychron in a cave. But the island has a terrible secret.

When Alpheus Benthos announces he has found the gates to Lemuria, the Nektons fear he's beaten them to their greatest prize.

Jeffrey is kidnapped, in his 'Jeffrey Knight', by Dark Orca pirates. Can Jeffrey turn the tables and save himself?

As the Nektons explore a mysterious tunnel behind a huge undersea waterfall, strange creatures and strong currents surprise them at every turn. Everything is not as it seems.

The Nektons are arrested for stealing. Ant and Fontaine escape to prove their innocence, but whoever set them up is already two steps ahead.

Fontaine and Smiling Finn get stuck inside a giant clam as the Dark Orca pirates battle the Nektons for the giant pearl within.

The Nektons try to stop a fallen satellite's fuel from polluting a marine sanctuary. But someone else is interested in the satellite.

A mysterious ancient temple beneath the sea has been hidden for centuries. The Nektons discover it was hidden for a very good reason.

A dragon hunting expedition leads Ant to an ancient scroll that holds clues to an amazing mystery. But his family are trapped by the dragon and only Ant and Jeffrey can save them. And Jeffrey's a fish.

Ant and Fontaine hunt for one of the rarest ocean creatures: the colossal squid. But it turns out to be smarter than anyone thought and thinks the Nektons look tasty. Can the Aronnax survive being pulled down very, very deep?

Proteus, leader of the mysterious Guardians, traps the Aronnax in a magnetic field and kidnaps Ant, believing he is the key to finding Lemuria.