2010

S4.E1 ∙ The Octonauts and the Poison Dart Frogs

Tue, Sep 22, 2015

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.

6.8 /10

S4.E2 ∙ Octonauts and the Hidden Lake

Wed, Sep 23, 2015

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

7.6 /10

S4.E3 ∙ Octonauts and the Octopod Mystery

Thu, Sep 24, 2015

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.

8.3 /10

S4.E4 ∙ Octonauts and the Baby Sea Turtles

Sun, Sep 27, 2015

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

7.7 /10

S4.E5 ∙ Octonauts and the Walrus Pups

Sun, Dec 06, 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?

7.6 /10

S4.E6 ∙ Octonauts and the Mantis Shrimp

Tue, Sep 29, 2015

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

7.4 /10

S4.E7 ∙ Octonauts and the Loneliest Whale

Wed, Sep 30, 2015

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.

7.6 /10

S4.E8 ∙ Octonauts and the Tree Lobsters

Tue, Dec 08, 2015

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.

7.4 /10

S4.E9 ∙ Octonauts and the Convict Fish

Tue, Dec 08, 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.

7.7 /10

S4.E10 ∙ Octonauts and the Emperor Penguins

Sun, Apr 02, 2017

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

7.8 /10

S4.E11 ∙ Octonauts and the Baby Gator

Sun, Mar 13, 2016

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

7.7 /10

S4.E12 ∙ Octonauts and the Bomber Worms

Sun, Mar 13, 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.

7.3 /10

S4.E13 ∙ Octonauts and the Crawfish

Mon, Mar 21, 2016

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

7.3 /10

S4.E14 ∙ The Octonauts and The Surfing Snails

Wed, Dec 21, 2016

7 /10

S4.E15 ∙ Octonauts and the Kelp Monster Mystery

Fri, Nov 04, 2016

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

6.8 /10

S4.E16 ∙ Octonauts and the Hippopotamus

Fri, Nov 04, 2016

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

7.4 /10

S4.E17 ∙ Octonauts and the Flamingos

Sun, Apr 03, 2016

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

7.7 /10

S4.E18 ∙ Octonauts and Operation Cooperation

Sun, Apr 03, 2016

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

6.8 /10

S4.E19 ∙ The Octonauts and the Tiger Shark

Fri, Nov 18, 2016

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

7 /10

S4.E20 ∙ The Octonauts and the Coelacanth

Fri, Nov 18, 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.

7.8 /10

S4.E21 ∙ Octonauts and the Yellow-Bellied Sea Snakes

Fri, Nov 11, 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.

7.6 /10

S4.E22 ∙ Octonauts and the Spinner Dolphins

Fri, Nov 18, 2016

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

7.5 /10

S4.E24 ∙ Octonauts and the Sunfish

Mon, Jun 13, 2016

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.

6.6 /10

S4.E25 ∙ Octonauts and the Great Swamp Search

Sun, Mar 27, 2016

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.

9.4 /10

S4.E26 ∙ Octonauts and the Coconut Crisis/Sunfish

Sun, Jun 05, 2016

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.

7.4 /10

S4.E27 ∙ Octonauts and the Operation Deep Freeze

Sun, Mar 26, 2017

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.

6.9 /10