The Octonauts Season 4 Episodes

Episode 1

The Octonauts and the Poison Dart Frogs

11 mins

A dangerous tidal wave washes all the fish up in the trees, which is also a big problem for the poison dart frogs who don't have enough puddles up in the trees for the tadpoles. Luckily, Tweak's new Gup-H is ready to help.

Episode 2

Octonauts and the Hidden Lake

11 mins

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

Episode 3

Octonauts and the Octopod Mystery

11 mins

The Octopod breaks down and Tweak and the crew search for a missing part on an abandoned prototype Octopod, but it's not completely abandoned.

Episode 4

Octonauts and the Baby Sea Turtles

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

Episode 5

Octonauts and the Walrus Pups

Mon, Dec 7, 2015

Barnacles' nephews Ursa and Orso are going to get their Polar Scout Badges, when they spot three walrus pups on a drifting floe which is on a crash-course with 2 icebergs. The pups are lost and too hungry to swim. Will Captain Barnacles be able to save them and finally earn the Walrus Rescue Badge - the only one he hasn't got?

Episode 6

Octonauts and the Mantis Shrimp

24 mins

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

Episode 7

Octonauts and the Loneliest Whale

11 mins

The Octonauts find a humpback whale who's all alone because his voice is different from the other humpbacks'. They have to help him because if nobody understands him, he won't find the way to the feeding ground.

Episode 8

Octonauts and the Tree Lobsters

Wed, Dec 9, 201511 mins

Peso gets washed up by a storm on a mysterious rocky island and discovers a group of insects thought to be extinct called tree lobsters.

Episode 9

Octonauts and the Convict Fish

Wed, Dec 9, 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.

Episode 10

Octonauts and the Emperor Penguins

Mon, Apr 3, 2017

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

Episode 11

Octonauts and the Baby Gator

Mon, Mar 14, 2016

Kwazii adopts a baby alligator, but when it escapes the Octopod, he must rescue the tiny creature from ocean currents and hungry predators.

Episode 12

Octonauts and the Bomber Worms

Mon, Mar 14, 2016

While diving down to the Midnight Zone, the Octonauts are attacked by bomber worms, and are enlisted to rescue an injured member of their troop.

Episode 13

Octonauts and the Crawfish

Tue, Mar 22, 2016

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

Episode 14

The Octonauts and The Surfing Snails

11 mins

Dashi tried to save surfing snails who are swept out to sea by a giant wave.

Episode 15

Octonauts and the Kelp Monster Mystery

Sat, Nov 5, 2016

Dashi teams up with her little sister, Koshi, to solve a mysterious disappearance in a kelp forest.

Episode 16

Octonauts and the Hippopotamus

Sat, Nov 5, 2016

Returning home from a mission along an African river, the Octonauts have trouble getting past a gang of large, territorial hippos.

Episode 17

Octonauts and the Flamingos

Mon, Apr 4, 2016

The Octonauts wade through a swamp to find a lost flamingo chick before hungry predators do.

Episode 18

Octonauts and Operation Cooperation

Mon, Apr 4, 2016

After Shellington crashes the Gup-D, he and Kwazii team up with a moray eel and grouper fish to pick up the pieces.

Episode 19

The Octonauts and the Tiger Shark

Sat, Nov 19, 2016

Tweak must help her friend Sandy the sea turtle escape a hungry tiger shark.

Episode 20

The Octonauts and the Coelacanth

Sat, Nov 19, 2016

While exploring a dark and spooky cave, the Octonauts discover the fossil of a powerful, prehistoric fish - but it may be more than just a fossil.

Episode 21

Octonauts and the Yellow-Bellied Sea Snakes

Sat, Nov 12, 2016

When a mass of poisonous sea snakes get stranded on a beach, Peso and the Octonauts must somehow get them all back into the ocean.

Episode 22

Octonauts and the Spinner Dolphins

Sat, Nov 19, 201624 mins

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

Episode 24

Octonauts and the Sunfish

Tue, Jun 14, 201624 mins

Coconut Crisis: Kwazii and the Octonauts help their friends the coconut crabs discover who is stealing their coconuts. Sunfish: The Octonauts must help a giant sunfish who can't swim straight, before it hurts other sea creatures and itself.

Episode 25

Octonauts and the Great Swamp Search

Mon, Mar 28, 201624 mins

The Great Swamp Search: The Octonauts journey to the Everglades to help Tweak's dad, Ranger Marsh, track down several invasive species - including a Burmese Python and her babies.

Episode 26

Octonauts and the Coconut Crisis/Sunfish

Mon, Jun 6, 201624 mins

Coconut Crisis: Kwazii and the Octonauts help their friends the coconut crabs discover who is stealing their coconuts. Sunfish: The Octonauts must help a giant sunfish who can't swim straight, before it hurts other sea creatures and itself.

Episode 27

Octonauts and the Operation Deep Freeze

Mon, Mar 27, 201724 mins

Captain Barnacles, Kwazii, and Peso are visiting The Polar Scout Emergency Post run by Tracker - a young polar bear trained by Captain Barnacles. Suddenly they receive a signal for help from a deserted research station on the opposite side of the world. Whoever could have sent the signal, the Octonauts have to answer it.