The Octonauts cheer Peso on as he goes home to compete against an awesomely athletic penguin.

The Octonauts travel to Professor Inkling's childhood home for Christmas, but they discover a rock slide has endangered all the creatures.

The Undersea Storm: When Kwazii's Gup-B breaks down in a storm, not even brave Captain Barnacles can save him alone. Fortunately, a chain of reef lobsters lends a hand - and some claws.The Giant Squid: The Octonauts set out to find and photograph Inkling's long lost cousin, the elusive Giant Squid.

The Great Algae Escape: Captain Barnacles and crew must catch a runaway Octopod, when it's hijacked by a group of crustaceans trying to escape their algae infested waters.The Walrus Chief: When Peso’s precious medical kit is taken, Barnacles and Kwazii sneak into a dangerous walrus colony to get it back – disguised as a walrus!

The Decorator Crab: When important objects go missing from their ship, the Octonauts stake out the thief who turns out to be a decorator crab, stealing their things to decorate his shell. The Whale Shark: When Dashi is accidentally swallowed by a whale shark, the Octonauts venture inside the huge fish to rescue her.

The Flying Fish: When a school of flying fish accidentally make off with a rare book belonging to Professor Inkling, the Octonauts rig up the Gup-B to fly after them and get it back.The Narwhal: While exploring the Arctic, the Octonauts’ ship, the Octopod, gets trapped in the ice. Only Barnacles skillful navigation – and the help of a friendly Narwhal – can get them free.