海底小纵队遭遇鲸鲨，巴克和呱唧外出寻找达西西时被鲸鲨吸入腹中，他们在鲸鲨肚子里相逢，在皮医生的帮助下，他们从鲸鲨肚子里逃了出来。

海底一场风暴来袭，队长巴克要求大家在风暴来临之前做好准备。队长给每个人分配好迎接风暴的任务。

深夜，一阵阵敲门声惊动章鱼堡。原来是海蜗牛前来求救，呱唧决定去探险。在呱唧和巴克队长的劝说下，螃蟹和海胆分开了。海蜗牛们终于可以睡觉了。

海象无意中找到一个医药包，皮医生向队长求救，海底小纵队成员伪装成海象开始问海象家族拿回医药包。

海底小纵队追捕正在逃跑中的小飞鱼，不幸的是其中一条小飞鱼不能飞起来。巴克队长要求小飞鱼一起回章鱼堡。皮医生拯救了小飞鱼。

海底小纵队的成员们在厨房忙碌着，巴克发现了海底洞穴，求教章教授，章教授说大王乌贼是它的表哥。

章鱼堡被大虎鲸包围，且遭到撞击。原来是因为大虎鲸好奇章鱼堡发出的声音。海底小纵队和新朋友大虎鲸玩起了游戏。

海底小纵队发现海底一个废弃的地方，这里布满了海藻，海底小纵队的潜艇不幸被海藻缠住，大家开始了逃离海藻行动。

谢灵通想要寻找桨足动物，可是巴克队长担心谢灵通不会驾驶魔鬼鱼艇。独自去寻找桨足动物的谢灵通，不小心撞船了，巴克队长带领小纵队前去搭救。

海底火山马上要喷发，非常危险。巴克队长命令海底小纵队，到火山区转移出所有的动物。终于，海底小纵队在紧急关头，疏散了海底生物

海底小纵队决定前去证实呱唧说的海底地图真实性。在巴克队长的命令下，海底小纵队飞向轮船失事的地方。

When the Octonauts find an unusual Sea Star on the beach, they search the ocean from top to bottom (literally) to help find its home.

皮医生告诉大伙自己听到奇怪的声音，达西西也抓拍到了奇怪的影子。谢灵通告知，这是一只鲸鱼。巴克队长决定带着大家去寻找答案。

When Kwazii's favorite sub, the Gup B, goes missing, the Octonauts journey into a mysterious kelp forest to find it, meeting strange and interesting creatures along the way.

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 horde of out of control puddings are attacking. Peso wins the contest between 2 types of blobs.

While exploring the Arctic, the Octopod gets trapped in the ice. Only Barnacles's skillful navigation, and the help of a friendly Narwhal, can get them free.

While exploring the deepest part of the ocean, the Midnight Zone, the Octonauts discover a strange rock that happens to be home to a new species of worm.

The Octonauts encounter a snapping shrimp – a small creature that uses its claws to make a big, and stunning, noise.

After an underwater tremor, an injured sea cucumber named Slippy gets loose on the Octopod, so to let her breathe, they flood the ship!

The Octonauts race against time to rescue Tweak's pal, a leatherback sea turtle who's caught in a fast-moving ocean current that's sucking it into a whirlpool.

When Captain Barnacles Bear and most of the crew are unable to return to base, it's up to Peso and Tweak to remove a stuck hermit crab from its shell.

When the Octonauts clean and repair their ship, the Octopod, the resulting noise causes a nearby blue whale to act in strange and dangerous ways.

When Peso's little brother, Pinto, comes to visit, he's more interested in being a pirate than a medic – at least until he accompanies Peso on a mission to rescue Dashi and Shellington in a kelp forest.

When important objects go missing from their ship, the Octonauts stake out the thief, who turns out to be a decorator crab stealing their things to decorate his shell.

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.

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.

Peso must gather all his courage when he travels deep down to the very bottom of the ocean, the Midnight Zone, and encounters the mysterious Vampire Squid.

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 to baby seahorses!

The Octonauts must rescue Peso when he gets trapped inside a giant ctenophore.

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.

Dashi snaps a picture of what appears to be a sea serpent, but the truth is stranger than fiction when it turns out to be an awesomely long Oarfish.

When Kwazii and Peso are shipwrecked on a desert island, they encounter a Combtooth Blenny - a fish who walks on land! They enlist him to send an SOS message to the other Octonauts.

When Shellington gets trapped in the middle of a massive Jellyfish bloom, it's up to the Octonauts to rescue him.

When a young dolphin follows Kwazii home, he has to babysit while the other Octonauts search for its mother.

When Captain Barnacles and Peso get lost in the icy Arctic sea, a pod of Orcas help the Octonauts find them.

Kwazii covets the treasure in a sunken pirate ship, but its protected by slime squirting Slime Eels.

When Peso and the Octonauts aid an enormous Elephant Seal, he overstays his welcome in the Octopod.

The Octonauts must work together as a team to help a lost sardine find her school.

When the Octonauts all pitch in to help save a sick coral reef, they get some unexpected help from a pod of playful dolphins.

The Octonauts travel up a treacherous river to help a young migrating eel on her difficult journey.

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!

Down in the darkness of the ocean deep, Peso and the Octonauts must help a tiny, injured Dwarf Lantern Shark.

When the Octonauts go on a pirate treasure hunt, Kwazii meets a Parrotfish.

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.

Captain Barnacles allows Tunip to use his Octo-compass. But when Tunip loses it, a cuttlefish takes it.

The Octonauts have their hands full as they look after a headstrong young Lemon Shark who's hurt his nose and can't find his way home.

When the Octopod's waterworks are flooded with frightened Humuhumu fish, the Octonauts have to find a way to flush them out.

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.