As of July 2026, Octonauts Season 3 aired in 2013 with 20 episodes — streaming now on Netflix. Full episode guide and where to watch below.
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Octonauts Season 3

2013 20 Episodes Animation · Kids ⭐ 7/10

Right now you can watch Octonauts Season 3 on and — and the writing holds up regardless of the format's reputation. The show says what it needs to say in a single season, no filler. Its 7/10 TMDB score, built from 57 ratings, reflects a title that consistently delivers. The visual style is immediately recognisable, but the writing is what keeps you watching. Put it on tonight and see for yourself.

Octonauts Season 3 arrived without much fanfare and built its audience the hard way — through word of mouth. Octonauts Season 3 treats animation as a medium, not a limitation. Season 3 of Octonauts includes 20 episodes. It aired from September 2013 to September 2015. This season stars Keith Wickham, Simon Greenall and Jo Wyatt. Keith Wickham and Simon Greenall lead a cast that brings real weight to the material. It was aired in 2013. The animation style is distinctive enough to be immediately recognisable, but it is the writing underneath that keeps viewers coming back for more. There is real craft here, even in the moments that do not fully land.

Genuinely enjoyable for a wide range of viewers, Octonauts Season 3 treats animation as a delivery mechanism, not a limitation. If you have run out of similar titles to watch, this is a strong next pick. Best experienced as a single, sustained watch if your schedule allows. Keith Wickham brings more to the role than the format usually demands. A harder one to justify skipping than to start.

📡 Where to Watch Octonauts Season 3

🇦🇺 Australia
🇺🇸 United States
🇬🇧 United Kingdom
🇨🇦 Canada
🇳🇿 New Zealand
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🎬 Octonauts Season 3 — Episode Guide

E1
The Siphonophore
2013-09-04
Kwazii and Dashi become entangled in a strange deep-sea creature - a siphonophore.
E2
The Water Bears
2013-09-05
The gang ventures into a red-hot lava tube to rescue a tiny water bear that does not seem to mind the heat at all.
E3
The Cone Snail
2013-09-06
Peso sets out to save the day when a cone snail invades the octopod and picks off the crew one by one with its dangerous harpoons.
E4
The Artificial Reef
2013-09-09
When an underwater storm destroys a small reef, Tweak and her crew try to convert the Gup-F into an artificial equivalent.
E5
The Humpback Whales
2013-09-10
When a sardine swallows the key to a treasure chest, a humpback whale helps Kwazii track it down.
E6
The Pelicans
2013-09-11
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.
E7
The Sea Pigs
2013-09-12
The Octonauts must stop a huge herd of sea pigs before they march blindly into the Mariana Trench - where there will be no access to food. But things get chaotic when Tunip goes missing!
E8
The Yeti Crab
2013-09-13
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.
E9
The Barracudas
2014-03-10
Shellington and the Vegimals' mission to replant a mangrove forest is put in peril by a school of toothy barracudas.
E10
The Duck-Billed Platypus
2014-03-11
While rescuing river creatures after a storm, the Octonauts find a strange egg and come under attack by stinging platypuses.
E11
The Sea Skaters
2014-03-12
When Kwazii gets lost at sea aboard the tiny octo-ski, he meets a flotilla of even tinier sea skaters - the only insects who live on the ocean.
E12
The Mudskippers
2014-03-13
The Octonauts attempt to keep the peace amongst a trio of mudskippers whose home has been flooded.
E13
The Harbour Seal
2014-03-14
When Peso's patient, a remora fish, mysteriously disappears, the Octonauts enlist a unique undersea detective - a harbour seal.
E14
The Lion's Mane Jellyfish
2014-03-17
A lion's mane jellyfish gets its long and stingy tentacles tangled in the bubble engine, unintentionally flooding the Octopod and causing havoc.
E15
The Red Rock Crabs
2014-03-18
When Shellington and the crew try to gather some skittish crabs who have drifted away from home, they get help from some old friends.
E16
The Sea Sponge
2014-03-19
A sea sponge that houses other sea creatures in its pores suffers from a mysterious illness and Peso must figure out the cause.
E17
The Immortal Jellyfish
2014-03-20
Shellington and the Octonauts try to track an unusual creature: a jellyfish that can transform from old to young repeatedly - and live forever!
E18
The Urchin Invasion
2014-03-21
The Octonauts head to the kelp forest to visit Shellington's sister, Pearl, and her newborn son Periwinkle - only to find the forest endangered by an infestation of kelp-eating urchins!
E19
The Hammerhead Sharks
2015-09-21
The Octonauts meet some hammerheaded sharks, however, they can't sleep too well because Shellington and Professor Inkling have been arguing about who is smarter that they are no longer friends.
E20
The Loggerhead Sea Turtle
2015-09-22
After an undersea tremor separates the Gup-X and its crew, Barnacles seeks guidance from a mysterious sea turtle.

🎭 Cast of Octonauts Season 3

Keith Wickham
Keith Wickham
Simon Greenall
Simon Greenall
Jo Wyatt
Jo Wyatt
RR
Rob Rackstraw
RB
Ross Breen
Captain Barnacles
Teresa Gallagher
Teresa Gallagher
Dashi
MM
Michael Murphy
Vegimals
Paul Panting
Paul Panting
Peso
Mary Murphy
Mary Murphy
Dashi
Shelley Longworth
Shelley Longworth
Additional Voices

📋 All Seasons of Octonauts

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