E1 - Octonauts and the Poison Dart Frogs

Aired: September 23, 2015

When a giant wave hurls Amazon River creatures up into the trees, the Octonauts must get them down safely, without disturbing poison dart frogs who live there.

E2 - Octonauts and the Hidden Lake

Aired: September 24, 2015

The Octonauts are exploring Antarctica, when Shellington discovers strange microscopic creatures living under the ice.

E3 - Octonauts and the Octopod Mystery

Aired: September 25, 2015

When the Octopod breaks down, Tweak and the crew search for a missing part aboard an abandoned prototype of the ship, not realising something lives there.

E4 - Octonauts and the Baby Sea Turtles

Aired: September 28, 2015

As newborn baby sea turtles make their way to the ocean, the Octonauts must steer them clear a giant wave and hungry predators.

E5 - Octonauts and the Walrus Pups

Aired: September 29, 2015

Captain Barnacles and his niece and nephew, Ursa and Orson, must rescue walrus pups who are stranded on a runaway ice floe, before it collides with a huge iceberg!

E6 - Octonauts and the Mantis Shrimp

Aired: September 30, 2015

The Octonauts must get 2 mantis shrimp to stop fighting before their powerful claw strikes destroy the Octopod.

E7 - Octonauts and the Loneliest Whale

Aired: October 01, 2015

The Octonauts follow a strange song to a lonely humpback whale.

E8 - Octonauts and the Tree Lobsters

Aired: October 02, 2015

When a storm washes Peso onto a mysterious, rocky island, he meets a band of lobster-like insects thought to be extinct.

E9 - Octonauts and the Convict Fish

Aired: December 14, 2015

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.

E10 - Octonauts and the Emperor Penguins

Aired: December 16, 2015

The Octonauts journey across a dangerous expanse of ice to help a penguin mother get back to her family.

E11 - Octonauts and the Crawfish

Aired: December 03, 2016

When a population of crawfish is stricken by illness, the Octonauts race to find a cure.

E12 - Octonauts and the Flamingos

Aired: December 04, 2016

The Octonauts find a lost flamingo chick separated from his family and they have to return him there before hungry alligators do!

E13 - Octonauts and the Tiger Shark

Aired: May 27, 2017

When a hungry tiger shark eats the camera that Tweak's turtle friend Sandy gets in the Octopod, she and the Octonauts must rescue her before it eats everything in its path.

E14 - Octonauts and the Sunfish

Aired: May 28, 2017

When a huge sunfish enters the GUP-E, Peso and Kwazii must somehow get the large fish out of the Gup. Eventually they find out it's a Sunfish a fish with no fins.

E15 - Octonauts and the Coelacanth

Aired: May 29, 2017

While exploring a dark and spooky cave, The Octonauts find a strange fossil of a powerful prehistoric fish... but it may be more than just a fossil!

E16 - Octonauts and the Surfing Snails

Aired: September 06, 2017

When surfing snails are swept out to sea, it's up to Dashi and the Octonauts to save them.

E17 - Octonauts and the Yellow Bellied Sea Snakes

Aired: September 13, 2017

When Peso gets stranded on a beach with a mass of poisonous snakes after a terrible storm, he and the Octonauts must somehow get them back to the ocean.

E18 - Octonauts and the Hippos

Aired: September 20, 2017

Trying to return home from a mission along an African river, the Octonauts have trouble getting past a gang of large, mud-splatting, territorial hippos.

E19 - Octonauts and Operation Cooperation

Aired: September 27, 2017

After Shellington crashes the GUP-D for the 3rd time, he and Kwazii team up with moray eels and grouper fish to help pick up the pieces and fix the vehicle before daylight occurs.

E20 - Octonauts and the Bomber Worms

Aired: October 23, 2017

While diving down to the Midnight Zone, the Octonauts are attacked by bomber worms.

E21 - Octonauts and the Kelp Monster Mystery

Aired: October 24, 2017

Dashi teams up with her little sister Koshi to help the Octonauts solve a mysterious disappearance in the Kelp Forest. This is the second episode in which is unknown who sounded the Octo-Alert.

E22 - Octonauts and the Coconut Crisis

Aired: October 25, 2017

Kwazii takes a vacation on Coconut Island where he gets hit by some coconuts. Then he and the Octonauts must help their old friends the Coconut Crabs discover who's stealing all their coconuts.

E23 - Octonauts and the Baby Gator

Aired: October 26, 2017

Kwazii adopts a baby alligator naming him Nipper, but when it escapes the Octopod, he and the Octonauts must rescue him.

E24 - Octonauts and the Spinner Dolphins

Aired: October 27, 2017

The Octonauts struggle to save a pod of spinner dolphins who seem to be just swimming in their sleep.