Season 3
20 episodes · first aired 2013-09-04
| Still | # | Title | Overview | Air date | Rating |
|---|---|---|---|---|---|
 | 01 | The Siphonophore 2013-09-04 | Kwazii and Dashi become entangled in a strange deep-sea creature - a siphonophore. | 2013-09-04 | 10.0 |
 | 02 | 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. | 2013-09-05 | 10.0 |
 | 03 | 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. | 2013-09-06 | 0.0 |
 | 04 | 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. | 2013-09-09 | 0.0 |
 | 05 | The Humpback Whales 2013-09-10 | When a sardine swallows the key to a treasure chest, a humpback whale helps Kwazii track it down. | 2013-09-10 | 0.0 |
 | 06 | 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. | 2013-09-11 | 0.0 |
 | 07 | 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! | 2013-09-12 | 0.0 |
 | 08 | 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. | 2013-09-13 | 0.0 |
 | 09 | 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. | 2014-03-10 | 0.0 |
 | 10 | 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. | 2014-03-11 | 0.0 |
 | 11 | 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. | 2014-03-12 | 0.0 |
 | 12 | The Mudskippers 2014-03-13 | The Octonauts attempt to keep the peace amongst a trio of mudskippers whose home has been flooded. | 2014-03-13 | 0.0 |
 | 13 | 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. | 2014-03-14 | 0.0 |
 | 14 | 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. | 2014-03-17 | 0.0 |
 | 15 | 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. | 2014-03-18 | 0.0 |
 | 16 | 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. | 2014-03-19 | 0.0 |
 | 17 | 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! | 2014-03-20 | 0.0 |
 | 18 | 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! | 2014-03-21 | 0.0 |
 | 19 | 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. | 2015-09-21 | 0.0 |
 | 20 | 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. | 2015-09-22 | 0.0 |
Ratings shown are community scores. Once OMDB is wired, these become per-episode IMDB values.