Octonauts Wiki


Season 1

Main article: Season 1
Seasons: 1 | 2 | 3 | 4 | 5 | 6

Season 1 was the first season of The Octonauts.


# Title Original air date[11]
1 "Octonauts and the Whale Shark" 4 October 2010
When Dashi is swallowed by a whale shark she thought was a cave, the Octonauts venture inside it to rescue her. 
2 "Octonauts and the Undersea Storm" 5 October 2010
An undersea storm is approaching so Kwazii helps some creatures on a coral reef reach safety, but then he crashes the Gup-B while trying to race back to the Octopod. When the GUP-C's tow-rope snaps while rescuing him, some reef lobsters Kwazii helped earlier lend a hand by holding the broken rope ends together with their strong claws. 
3 "Octonauts and the Crab and Urchin" 6 October 2010
carrier crab and the urchin it keeps on top of its shell as a defence against predators[12] have a falling out. 
4 "Octonauts and the Walrus Chief" 7 October 2010
A walrus mistakes Peso's medical bag for a clam and takes it home. Walruses don't like other animals near their colonies, so Captain Barnacles, Kwazii and Peso disguise themselves as a fellow walrus to sneak into the dangerous colony and retrieve the medical bag. 
5 "Octonauts and the Flying Fish" 8 October 2010
A school of flying fish accidentally make off with Professor Inkling's rare book. 
6 "Octonauts and the Giant Squid" 11 October 2010
The Octonauts set out to find and photograph Inkling's long lost cousin, the giant squid. 
7 "Octonauts and the Orcas" 12 October 2010
An enormous Orca whale is stranded on a beach, and with some help from some crabs, the Octonauts manage to rescue it. 
8 "Octonauts and the Great Algae Escape" 13 October 2010
The crew must catch a runaway Octopod after it is hijacked by a group of crustaceans who are trying to flee an area of seabed being polluted by a broken pipeline. 
9 "Octonauts and the Remipedes" 14 October 2010
Shellington goes to search for a group of Remipedes in a cave but he hasn't driven the GUP-D before and ends up crashing it and breaking it. The other Octonauts try to save him but they get lost too. Luckily, a group of blind Remipedes help them find their way out of the cave. 
10 "Octonauts and the Speedy Sailfish" 15 October 2010
Tweak's remote control system for the Gups malfunctions, so Barnacles and Kwazii are forced to chase after them with the pedal-driven Gup-F. Luckily some speedy Sailfish, the fastest fish in the sea, are persuaded to show their off prowess by rounding up the speeding Gups. 
11 "Octonauts and the Blobfish Brothers" 18 October 2010
The Octonauts must evacuate some slow moving, gelatinous Blobfish before an undersea volcano erupts. 
12 "Octonauts and the Monster Map" 19 October 2010
Kwazii has a pirate map showing the location of a sunken treasure ship which allegedly harbours a Kraken-like sea monster (but which turns out to be an octopus which can change colour to camouflage itself). 
13 "Octonauts and the Lost Sea Star" 20 October 2010
A sea star (starfish) has got lost, but the Octonauts have to search the sea from top to bottom to find its home, as there are nearly 2000 species of sea star living at all levels of the ocean. On a reef in the Sunlight Zone they encounter a Sunflower seastar and a predatory Porcupine Pufferfish. In the Twilight Zone they encounter Brittle stars and get chased into a cave by a Wolf eel, where they notice the sea star glows in the dark, which means it is from the Midnight Zone. They end up crashing the Gup at the bottom of an ocean trench, but luminous sea stars light the way out for them. 
14 "Octonauts and the Albino Humpback Whale" 21 October 2010
The Octonauts think they've seen a ghost but it turns out to be an albino Humpback Whale which is moaning from the pain of some nasty sunburn. 
15 "Octonauts and the Giant Kelp Forest" 22 October 2010
Kwazii's favorite sub, the Gup B, goes missing in a huge kelp forest due to Kwazii pressing the eject button while the engine was active (Something Tweak advised him not to do) and the Octonauts must retrieve it. 
16 "Octonauts and the Enemy Anemones" 25 October 2010
The Octonauts land on an island for a picnic but must first help some crabs trapped between two warring groups of aggregate anemones. Meanwhile back on the Octopod, a hoard of out of control puddings are attacking. 
17 "Octonauts and the Narwhal" 26 October 2010
Cruising underwater to Captain Barnacles' homeland, the North Pole, the Octopod gets trapped in the Arctic sea ice. But one of Barnacles' old friends, Boris the Narwhal, helps them to break through the ice with his long tusk. 
18 "Octonauts and the Midnight Zone" 27 October 2010
The Octonauts explore the deepest part of the ocean - the Midnight zone - where no daylight ever reaches and find some hydrothermal vents where vent fishlimpets and tube worms live, and also discover a new species of worm to put in Shellington's book. 
19 "Octonauts and the Snapping Shrimp" 28 October 2010
A little snapping shrimp with a big claw makes such a loud noise that it stuns the Octonauts. A video of it made by Dashi reveals that the sound and accompanying shock wave are caused by the shrimp making a cavitation bubble with her claw. 
20 "Octonauts and the Snot Sea Cucumber" 29 October 2010
An injured snot sea cucumber named Slippy gets loose on the Octopod, so to let her breathe, they flood the ship. 
21 "Octonauts and the Giant Whirlpool" 1 November 2010
The Octonauts need to save Tweak's good friend, Sandy the Leatherback sea turtle, when she is stuck in a wrong current of water heading for a whirlpool and needs to get to the beach to lay her eggs. 
22 "Octonauts and the Hermit Crabs" 2 November 2010
With half the crew stranded in a rock pool due to a low tide, Peso and Tweak help to remove a stuck Hermit Crab from the shell it has outgrown. 
23 "Octonauts and the Mixed Up Whales" 3 November 2010
The Octonauts clean and repair the Octopod, but the loud noises they are creating confuse the sonar of two Blue Whales who are looking for each other so much that they almost crash into the ship. 
24 "Octonauts and the Kelp Forest Rescue" 4 November 2010
Peso's little brother Pinto visits the Octonauts and gets an eyepatch from Kwazii. He becomes more interested in being a pirate than a medic (stating that he wanted to be a 'real' Octonaut like Kwazii). But when he helps Barnacles, Kwazii and Peso in a mission to help Dashi and Shellington escape from a kelp forest, he begins to like being a medic. 
25 "Octonauts and the Decorator Crab" 5 November 2010
The Octonauts stake out a thief, who turns out to be a decorator crab
26 "Octonauts and the Beluga Whales" 6 December 2010
The Octonauts lead a pod of Beluga Whales stuck under the pack ice to safety by getting them to follow Peso while he's playing the same tune as the Beluga's song on his xylophone. 
27 "Octonauts and the Hungry Pilot Fish" 7 December 2010
The Octonauts are chased by a whitetip shark only to discover all it really needed was a pilot fish to clean its teeth, and it just so happens that they have just met a lonely pilot fish that is hungry for action. 
28 "Octonauts and the Vampire Squid" 8 December 2010
On a solo training dive to the Midnight Zone, Peso encounters a hurt vampire squid. Scared by the sudden arrival of Kwazii and Captain Barnacles it sprays them with sticky bioluminescent mucus and flees, but in the end Peso is able to help it. 
29 "Octonauts and the Seahorse Tale" 9 December 2010
After a storm, the Octonauts help a female seahorse search for her missing mate. She tells them to Kwazii's surprise that the missing male seahorse is about to give birth. 
30 "Octonauts and the Giant Jelly" 10 December 2010
The Octonauts must rescue Peso when he gets trapped inside a giant Comb Jelly
31 "Octonauts and the Cookiecutter Sharks" 13 December 2010
Some mysterious holes that keep appearing in the Octonauts' equipment turn out to be the work of Cookiecutter Sharks whose bioluminescence initially made them invisible against the light coming down from the sea surface. 
32 "Octonauts and the Oarfish" 14 December 2010
Dashi catches a glimpse of an elusive creature that appears to be a giant sea serpent and manages to photograph its tail. At the Octopod Professor Inkling finds out that it is an Oarfish - the longest fish in the ocean.  
33 "Octonauts and the Combtooth Blenny" 15 December 2010
Kwazii crashes the GUP-E, leaving him and Peso marooned on a desert island inhabited by Combtooth Blenny a fish that can walk on land. Their SOS message to the Octonauts is relayed in increasingly garbled form via the Blenney, a giant squid, and an Angler fish
34 "Octonauts and the Jellyfish Bloom" 16 December 2010
Shellington gets trapped in a sea nettlejellyfish bloom whilst observing garden eels in the GUP-E. Barnacles, Kwazii and Peso attempt to save him but Barnacles gets stung by a jellyfish. Luckily, Peso heals it using vinegarand then goes to save Shellington along with Kwazii. 
35 "Octonauts and the Baby Dolphin" 29 December 2010
A young dolphin follows Kwazii home and the Octonauts must search for its mother. 
36 "Octonauts and the Scary Spookfish" 24 January 2011
Peso gets jammed in an ocean trench when the GUP-E's battery dies and is surprised by a strange deep sea fish with a transparent head: a Spookfish called Boo, whose ability to see vertically comes in handy as GUP-C winches GUP-E back up the narrow trench.  
37 "Octonauts and the ArcticOrcas" 25 January 2011
Captain Barnacles and Peso get lost in the icy Arctic sea when the GUP-E gets stuck in an iceberg and the gup finder is damaged. 
38 "Octonauts and the Slime Eels" 26 January 2011
In the North Atlantic, Kwazii searches the sunken shipwreck of his pirate grandfather, Calico Jack, for his gold spyglass. It's guarded by blind hagfish (slime eels), but their slime unexpectedly helps him when he gets stuck. Kwazii ends up leaving the spyglass because it's now the home of sea creatures. 
39 "Octonauts and the Enormous Elephant Seal" 27 January 2011
An enormous Elephant seal is brought into the Octopod to moult as moulting underwater is dangerous, and the Octonauts need to bring him to his beach. 
40 "Octonauts and the Sardine School" 29 January 2011
The Octonauts must work together as a team to help a lost sardine find her school. 
41 "Octonauts and the Dolphin Reef Rescue" 31 January 2011
Peso and the gang try to cure bleached dead areas on a coral reef by transplanting healthy coral, but a pod of playful dolphins make mischief for them until they realise that helping can be fun too. 
42 "Octonauts and the Eel Ordeal" 1 February 2011
In a rare journey into fresh waters (a river), the Octonauts follow some migrating eels and help an injured eel on his difficult journey when he gets stranded from the others. 
43 "Octonauts and the Marine Iguanas" 2 February 2011
The team are preparing for a feast of red seaweed on the Galapagos Islands but a trio of salt-sneezing Marine Iguanas raid the Octopod and eat it all. 
44 "Octonauts and the Dwarf Lantern shark" 3 February 2011
The Octonauts must help a tiny, injured Dwarf Lanternshark, but they have to find him first. 
45 "Octonauts and the Pirate Parrotfish" 4 February 2011
Kwazii discovers Calico Jack's Parrot Island treasure map behind an old photo. Whilst looking for the island they meet a Parrotfish, who helps them clear away dense algae and hide from vicious moray eels
46 "Octonauts and the Electric Torpedo Rays" 7 February 2011
Some electric torpedo rays give the Octopod a jump-start when its batteries go flat during a trip to see Tweak's pal, Sandy the leatherback sea turtle. 
47 "Octonauts and the Crafty Cuttlefish" 8 February 2011
Captain Barnacles allows Tunip to use his Octo-compass. But when Tunip loses it, a Cuttlefish takes it. 
48 "Octonauts and the Lost Lemon Shark" 9 February 2011
The Octonauts look after a Lemon Shark who has hurt his nose and can't find his way home. 
49 "Octonauts and the Humuhumunukunukuapua'a" 10 February 2011
The Octopod's waterworks become flooded with frightened Humuhumu fish. 
50 "Octonauts and the Giant Spider Crab" 11 February 2011
The Octonauts help a 100-year-old spider crab which has got its leg trapped in a giant clam whilst en route to its own 100th birthday party. It turns out that Kwazii's afraid of spiders, but he still helps, even though he thought it was a real spider at first. 

Season 2

A second series of 22 episodes started on 19 November 2012 on the UK's CBeebies channel[13] but was halted with no explanation after 10 episodes leading to criticism from viewers.[14] Broadcasts resumed in March 2013 but stopped a week later (with the last 6 episodes still unaired) - then resumed again in September 2013.

# Title Original air date
1 "Octonauts and the Colossal Squid" 19 November 2012
The Octopod is grabbed by a Colossal Squid which drags it down into the depths. The Octonauts are unable to break free due to the hooks on the ends of the Squid's tentacles. Fortunately the arrival of some sperm whales turns the squid from hunter to hunted. 
2 "Octonauts and the Adelie Penguin" 20 November 2012
Kwazii and Peso have to babysit some adelie penguin chicks whilst their parents go hunting for fish. Captain Barnacles uses the Gup-C's icebreaking powers to get them home when an iceberg blocks the way. 
3 "Octonauts and the Coconut Crabs" 21 November 2012
Kwazii is driving the GUP-B when a school of flying fish comes around and he is gliding with the fish Kwazii notices he is hit by a coconut and it has the symbol of his grandfather Calico Jack so then Kwazii, Captain Barnacles, Peso, and Tweak get a family of coconut crabs to help him open it. 
4 "Octonauts and the Great White Shark" 22 November 2012
Peso narrowly escapes when a hungry great white shark tries to eat him. Despite this he wants to help it after it injures its fin against the Octopod. The Octonauts use the Gup-X to turn the shark upside down and induce tonic immobility whilst Peso bandages it, but it comes round and in the end they escape by feeding it Tunip's fish biscuits to satisfy its hunger. 
5 "Octonauts and the Sea Snakes" 23 November 2012
Dashi discovers that the Octopod is being threatened by a whirlpool and then Tunip later sees that there are some strange objects in the Garden Pod so he goes and gets Shellington and he later sees that they are sea krait eggs. The Octonauts try to find all the snakes so they won't get sucked into the whirlpool. Then the Octonauts later discover that one of the snakes is missing the Octonauts venture throughout the Octopod to find it. The snake ends up in HQ and reversing the ship and the octopod gets sucked into the whirlpool. 
6 "Octonauts and the Bowhead Whales" 26 November 2012
Captain Barnacles' old friend Boris the narwhal and his narwhal mates (see Series 1, episode 17) are trapped under the Arctic ice. After failing to rescue them with the Gup-C's icebreaker and the GUP-D's drill, they enlist the help of some bowhead whales whose massive heads can break through thick ice. 
7 "Octonauts and the Jawfish" 27 November 2012
A jawfish father has lost the eggs he was brooding. 
8 "Octonauts and the Porcupine Pufferfish" 28 November 2012
The Octonauts venture inside a whale shark again (see Series 1, episode 1), this time to rescue a porcupine puffer fish
9 "Octonauts and the Damselfish" 29 November 2012
Some algae-eating fish need help dealing with damselfish that chase them off the algae they are farming. 
10 "Octonauts and the Scared Sperm Whale" 30 November 2012
Peso tries to help a young sperm whale overcome his fear of deep diving, an ability it must later use to rescue Peso when he gets caught by a giant clam on the seabed. 
11 "Octonauts and the Long-armed Squid" 11 March 2013
Peso and Kwazii search a creepy shipwreck in the midnight zone, looking for an injured creature that their friend the vampire squid(see Series 1, episode 28) has heard moaning in the dark. Peso soon finds an injured angler fish but the real source of the moaning turns out to be a long-armed squid, a strange ghostly white creature with elbows in its extraordinarily long tentacles, one of which has become trapped in the timbers of the wreck. 
12 "Octonauts and the Fiddler Crabs" 12 March 2013
The Octopod's periscope breaks off during a storm and lands up on a beach, lost amongst other marine debris. The Octonauts clean up the beach whilst searching for the periscope but a resident colony of fiddler crabs mistake the Gup-D and its claw gestures for a hostile giant crab and attack. The Gup-D goes haywire with a fiddler crab at the controls and burrows under the beach causing a sink hole to appear which almost swallows them all up. In the end the crabs fill the hole in with the sand balls they regurgitate whilst feeding. 
13 "Octonauts and the Manta Rays" 13 March 2013
A young manta ray needs help finding the secret manta ray feeding grounds. 
14 "Octonauts and the Swashbuckling Swordfish"

"Octonauts and the Flying Swords" (US title)[citation needed]

14 March 2013
When Kwazii sees what seem to be three flying swords under the Pirate's Moon, he embarks on a quest to find the Sword of the Pirate King, which legend says is on a wreck guarded by magical flying swords. The "flying swords" turn out to have been swordfish, which love jumping out of the water, but the pirate sword proves to be real. Meanwhile the others are led on a wild goosechase into a kelp forest following the pirate wreck's drifting figurehead, a carving of a pirate cat, which they mistake for Kwazii. 
15 "Octonauts and the Triggerfish" 15 March 2013
The Octonauts' floating temperature sensors alert them to a risk of waterspouts due to a rise in sea surface temperature so they decide to retrieve the devices for safe-keeping. But Kwazii gets into an argument with a possessive triggerfish which has adopted one of the devices as its home, and they both get carried away by a waterspout. Kwazii ends up having to defend the fish from a seabird and a swordfish that want to eat it. Luckily the characteristic grunting sounds that triggerfish make when distressed enables the other Octonauts to locate them. 
16 "Octonauts and the Mimic Octopus" 13 May 2013
Peso is gathering red algae to cure the sick Vegimals but needs the shapeshifting skills of a Mimic Octopus to scare off a Moray eel by using its striped tentacles to pretend to be a group of poisonous sea snakes
17 "Octonauts and the Lionfish" 14 May 2013
Invasive Lionfish are damaging coral reefs in the Atlantic Ocean and need taking back to their native Pacific Ocean
18 "Octonauts and the Leafy Sea Dragons" 15 May 2013
Some leafy sea dragons accidentally get into the Octopod. 
19 "Octonauts and the Manatees" 16 May 2013
After his Gup is struck by lightning, Captain Barnacles gets trapped by a giant clam but doesn't call for help as he wants the others to go help some manatees at risk from a thunderstorm. 
20 "Octonauts and the Saltwater Crocodile" 17 May 2013
An enormous Australian saltwater crocodile is lost in the Antarctic Ocean and needs taking home. 
21 "Octonauts and the Humphead Parrotfish" 2 September 2013
The Octonauts use magnets and a humphead parrotfish to try to stop a large meteor that's heading towards the Octopod. 
22 "Octonauts and the Gulper Eels" 3 September 2013
Hungry gulper eels as well as undersea tremors threaten Inkling and Kwazii and get trapped by boulders. So Dashi uses Tweak's newly built "Octo Mach-Suit" to rescue Inkling and Kwazii. 

Season 3

A third series of 22  episodes started being broadcast by CBeebies on 4 September 2013.[15]

Note: Two new episodes called Octouants & the Queensland Lungfish & Octouants & the Meaglodon were on Wikipedia of Octouants!.

# Title Original air date
1 "Octonauts and the Siphonophore" 4 September 2013
Kwazii and Dashi become entangled in a strange deep-sea creature - a siphonophore - and when a geyser blasts it toward the surface, the Octonauts must stop its ascent before it bursts. 
2 "Octonauts and the Water Bears" 5 September 2013
The Octonauts venture into a dangerous red-hot lava tube to rescue a teeny tiny water bear
3 "Octonauts and the Cone Snail" 6 September 2013
Only Peso can save the day when a cone snail invades the Octopod and tranquilizes the crew one by one with its dangerous venom-filled harpoons. 
4 "Octonauts and the Artificial Reef" 9 September 2013
When an underwater hurricane destroys a small reef, which a frogfish and other creatures depend on, Tweak and the crew must convert the recently destroyed Gup-F into an artificial reef before the second stage of the hurricane strikes! 
5 "Octonauts and the Humpback Whales" 10 September 2013
When a sardine swallows the key to a treasure chest, a humpback whale helps Kwazii track it down. 
6 "Octonauts and the Pelicans" 11 September 2013
When a floating garbage patch endangers a flock of pelicans and other sea creatures, the Octonauts and the birds work together to clean it up. 
7 "Octonauts and the Sea Pigs" 12 September 2013
The Octonauts must stop a huge herd of sea pigs before they march blindly into the Mariana Trench - the deepest point on earth! 
8 "Octonauts and the Yeti Crab" 13 September 2013
As Tweak tests the Gup-X deep down in the Midnight Zone, a yeti crab cuts a vital electrical wire in the ship and cuts off all power, endangering itself and the Octonauts. 
9 "Octonauts and the Barracudas" 10 March 2014
Shellington and the Vegimals are on a mission to replant a mangrove forest, but some hungry barracudas make the job pretty hard. 
10 "Octonauts and the Duck-Billed Platypus" 11 March 2014
While rescuing river creatures after a storm, the Octonauts find a strange egg. 
11 "Octonauts and the Sea Skaters" 12 March 2014
When Kwazii gets lost at sea aboard the tiny octo-ski, he meets a flotilla of sea skaters
12 "Octonauts and the Mudskippers" 13 March 2014
The Octonauts attempt to keep the peace amongst a trio of mudskippers whose home has been flooded. 
13 "Octonauts and the Harbour Seal" 14 March 2014
When Peso's patient, a remora fish, mysteriously disappears, the Octonauts enlist a unique undersea detective - a harbour seal
14 "Octonauts and the Lion's Mane Jellyfish" 17 March 2014
An enormous Lion's Mane jellyfish gets its amazingly long tentacles tangled in the Octopod's engine whilst Tweak is working on it. 
15 "Octonauts and the Red Rock Crabs" 18 March 2014
Shellington and the others round up some lost red rock crabs and marine iguanas that have got marooned on an island far too cold for them and take them home to the Galapagos Islands
16 "Octonauts and the Sea Sponge" 19 March 2014
Examining a sick sea sponge, Peso is surprised to discover that all sorts of creatures live inside it, treating it like a hotel, a behaviour known as commensalism
17 "Octonauts and the Immortal jellyfish" 20 March 2014
While caring for sea creatures, Peso discovers an adult Immortal Jellyfish that changes into a baby when it was scared by predators. Captain Barnacles, Kwazii and Peso guard the jellyfish at a distant reef, so Shellington rushes to photograph it, damaging the Gup-E and booster packs in the process. 
18 "Octonauts and the Urchin Invasion" 21 March 2014

Kelp-eating red sea urchins attack a kelp forest. The Octonauts are helped by Shellingtons's sister, Pearl, another sea otter and scientist. 

Season 4

# Title Original air date
1 "Octonauts and the Poison Dart Frogs" 23 September , 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.


"Octonauts and the Hidden Lake"

 24 September , 2015

The Octonauts are exploring antarctica, When Shellington discovers strange microscopic creatures living under the ice.


"Octonauts and the Octopod Mystery"

 25 September , 2015

After the Octopod breaks down, Tweak knows that the only way to get the new part that she needs is to take a trip to the old Octopod. But they may not be alone in their abandoned ship...

4 "Octonauts and the Baby Sea Turtles" 28 September 2015
As newborn baby sea turtles make their way to the ocean, the Octonauts must help them avoid predators when a large wave threatens the island where the precious eggs are buried - not that they'll admit it!
5 "Octonauts and the Walrus Pups" 29 September 2015
Captain Barnacles' niece and nephew Ursa and Orson 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 two icebergs. Will Captain Barnacles be able to save them and finally earn the Walrus Rescue Badge - the only one he hasn't got?
6 "Octonauts and the Mantis Shrimp" 30 September 2015
The Octonauts must get two mantis shrimp to stop fighting before their powerful claw strikes destroy the Octopod.
7 "Octonauts and the Loneliest Whale" 1 October 2015
The Octonauts follow a strange song to a lonely humpback whale who is alone because he does not sound like the other whales! They have to help him because if nobody understands him, he won't find the way to the feeding ground.
8 "Octonauts and the Tree Lobsters" 2 October 2015
A storm washes Peso onto a mysterious, rocky island where he meets a band of lobster-like insects thought to be extinct. But he and the Octonauts must catch a baby tree lobster that ended up in the Octopod and bring him back to Balls Pyramid.
9 "Octonauts and the Convict Fish" 14 December 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!
10 "Octonauts and the Emperor Penguins" 16 December 2015
The Octonauts journey across a dangerous expanse of ice to help a penguin mother get back to her family, but they lose contact along the way.
11 "Octonauts and the Baby Gator" 14 March 2016

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

12 "Octonauts and the Bomber Worms" 14 March 2016

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

13 "Octonauts and the Crawfish" 22 March 2016

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

14 "Octonauts and the Surfing Snails" 22 March 2016

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

15 "Octonauts and the Flamingos" 4 April 2016

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

16 "Octonauts and the Operation Cooperation" 4 April 2016

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.

17 "Octonauts and the Kelp Monster Mystery" 4 June 2016

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.

18 "Octonauts and the Yellow Bellied Sea Snakes" 5 June 2016

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.

19 "Octonauts and the Coconut Crisis" 6 June 2016

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.

20 "Octonauts and the Coelacanth" 7 June 2016

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!

21 "Octonauts and the Tiger Shark" 8 June 2016

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.

22 "Octonauts and the Hippos" 9 June 2016

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.

23 "Octonauts and the Spinner Dolphins" 13 June 2016

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

24 "Octonauts and the Sunfish" 14 June 2016

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.

Special Episodes

# Title Original air date
1 "Octonauts and the Great Penguin Race" 13 December 2010
Peso is going home to Antarctica to watch an annual penguin triathlon, the Iron Clam Competition, but learns to his dismay that his little brother Pinto has entered him in it. Peso will have to slide, dive and swim his way to victory, against the annual athletic winner, Hugo. 
2 "Octonauts and the Great Christmas Rescue" 24 December 2011
The Octonauts travel for Christmas to Professor Inkling's childhood home, a seamount, but soon get involved in a rescue mission when a rockslide endangers a rare 500 year-old golden coral and traps Professor Inkling's nephew Squirt. They also learn about Christmas tree worms which live in holes in rocks. Crucial to completing the mission is the new heavy-duty vehicle Gup-X which Tweak has built as an early present for Captain Barnacles. 
3 "Octonauts and the Amazon Adventure" 1 January 2013
Kwazii enters a shipwreck to get Calico Jack's map to an underwater city of gold. This leads the octonauts up the Amazon River, past parrotsfreshwater stingrayscaiman and manatees. But a falling tree traps the Gup-A, and a tidal bore comes up the river, scattering the octonauts. Captain Barnacles looks for the others with the aid of a river dolphin and its echolocation abilities. The octonauts help an electric eel, a strandedarapaima, and get chased by piranhas. But a wood-eating panaque frees the trapped Gup-A. Meanwhile Kwazii has been saved by Calico Jack who turns out to be alive, but lost his ship after an attack by fire antsand an anaconda. His incomplete map had led him in circles, but Kwazii's piece completes it so they can finish the quest. After being blocked by hostile capybaras, they are reunited with the others in time to fight off more anacondas. Finally the "city of gold" turns out to be a colony of golden freshwater sponges in the bottom of a pool! 
4 "The Mariana Trench Adventure" 27 May 2013
The Octonauts assemble Tweak's new Deep Sea Octolab and lower it to the deepest part of the ocean, the Mariana Trench, where Shellington and Dashi intend to study the sealife. Whilst the Octonauts are setting up the base it is invaded by some giant isopods and other creatures which are looking for a new hydrothermal vent to live around. They also observe some sea cucumbers and luminous sea stars, and whilst chasing an out of control Octobot robot, Kwazii has to avoid undersea mud volcanoes which have created a lake of hot mud on the seafloor and lava. 
5 "Octonauts and a Very Vegimal Christmas" 10 December 2013
When all of the Octonauts are trapped in a dangerous blob of Marine Mucilage, the Vegimals must step up and build a new Gup called the Gup-V to rescue the crew in time for the Christmas meal! 
6 "The Over, Under Adventure" 14 March 2014

The Octonauts' mission to explore Antarctica during which they marvel at sea tulips and hourglass dolphins 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. So the crew use the recently built GUP-S to save the day, with the help of a Weddell seal

7 "Octonauts and the Great Swamp Search" 28 March 2016

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.