Simon Greenall

Baby Sea Turtles: As newborn baby sea turtles make their way to the ocean, the Octonauts must steer them clear of a giant wave and hungry predators. Octopod Mystery: When the Octopod breaks down, Tweak and the crew search for a missing part aboard an abandoned prototype of the ship, not realizing something lives there.

The Octonauts travel to Professor Inkling's childhood home for Christmas, an undersea mountain. But they discover that a rockslide has endangered the local creatures – including a rare species of golden coral, and Inkling's little octopus nephew, Squirt! With the help of Tweak's latest invention, the Gup-X, the Octonauts must rescue the creatures and save Christmas!

Emperor Penguins: The Octonauts journey across a dangerous expanse of ice to help a penguin mother get back to her family. Tiger Shark: Tweak must help her friend Sandy the sea turtle escape a hungry tiger shark.

Crafty Cuttlefish: The Octonauts are on a mission to recover Captain Barnacles lost Octo-compass, but its been taken by a crafty, shape-shifting Cuttlefish! Lost Lemon Shark: The Octonauts have their hands full as they look after a headstrong young Lemon Shark who's hurt his nose and can't find his way home.

The Vegimals' plans for a Christmas feast aboard the Octopod are interrupted when the Octonauts are all entangled in a gigantic blob of sea snot!

Kelp Forest Mystery: Dashi teams up with her little sister, Koshi, to solve a mysterious disappearance in a kelp forest. Hippos: Returning home from a mission along an African river, the Octonauts have trouble getting past a gang of large, territorial hippos.

Tree Lobsters: When a storm washes Peso onto a mysterious, rocky island, he meets a band of lobster-like insects thought to be extinct. Convict Fish: The Octonauts evacuate the creatures living around a reef before a large archway collapses, but one stubborn convict fish refuses to move from her burrow.

Triggerfish: When he's carried away by a cyclonic waterspout, Kwazii finds himself stranded in the desert-like open ocean with a triggerfish who's made her home underneath the damaged Gup-B. Saltwater Crocodile: When a gigantic saltwater crocodile wanders into freezing waters, the Octonauts must figure out how to get the predator back to his warm water home – without anyone getting hurt.

The Giant Kelp Forest: When Kwazii's favorite sub, the Gup-B goes missing, the Octonauts journey into a mysterious kelp forest to find it, meeting strange and interesting creatures along the way. The Hermit Crab: When Captain Barnacles and most of the crew are unable to return to base, its up to Peso and Tweak to remove a stuck Hermit Crab from its shell.

Humphead Parrotfish: The Octonauts use magnets to try to stop a meteor that's heading toward the Octopod and get an assist from a rock-chomping humphead parrotfish and her friends. Leafy Sea Dragons: When two young leafy sea dragons are accidentally separated from their father and brought onboard the Octopod, the Octonauts must find them before they end up in Kwazii's stew!