1. The Great Penguin Race

The Octonauts cheer Peso on as he goes home to compete against an awesomely athletic penguin in an annual tournament: the Iron Clam Competition.

2. The Great Christmas Rescue

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.

3. The Amazon Adventure

In this special episode, the Octonauts travel deep down the Amazon river in search of a lost city - and Kwazii's long lost grandfather, Calico Jack!

4. The Mariana Trench Adventure

Tweak has designed a brand-new Deep Sea Station to study the deepest, darkest reaches of the ocean, but the Octonauts face multiple challenges: from getting it down there, to the extreme environment and strange, prehistoric creatures that greet them once they arrive.

5. The Very Vegimal Christmas

Christmas special of the animated deep sea adventure series. 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!

6. The Over Under Adventure

The Octonauts' mission to explore Antarctica becomes a desperate rescue as a group of sea stars and urchins are threatened by a brinicle - a rare underwater icicle that can freeze creatures on the sea bed.

7. The Great Arctic Adventure

Peso goes with Barnacles to help his sister and her new polar cubs learn to navigate the harsh conditions of the frozen arctic.

8. Operation Deep Freeze

9. The Great Swamp Search

10. Octonauts and the Great Swamp Search

Tweak and the Octonauts go to The Everglades to visit her dad, Ranger Marsh and help him rescue some non-native creatures before a storm hits. The team's recently built GUP-K is also there to save the day.

11. Octonauts and the Caves of Sac Actun

The Octonauts embarked on an underwater adventure navigating a set of challenging caves to help a small octopus read return home to the Caribbean Sea.

12. Octonauts and the Great Barrier Reef

In this musical special the Octonauts must find a way to hold back hungry swarms of Crown of Thorns starfish to save a new friend's fragile reef home.

13. Octonauts and the Ring of Fire

The Octonauts create a Mantis Shrimp Robot to save the oceanic creatures from a tsunami and volcanic eruptions in the Pacific Ring of Fire.