Season 5
27 episodes
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S5E1Whales of Mystery
Dec 28, 202011mShellington is excited to find the distinctive tooth of a very rare creature, the spade-toothed beaked whale. Now, the Octonauts must find the tooth’s owner, so Shellington can study it, and so that Peso can help replace its tooth. But it won’t be easy: spade-toothed beaked whales like to be left alone and can dive very deep.
S5E3Blue Whale Rescue
Dec 30, 202010mWhen Kwazii discovers a blue whale with an injured tail, the Octonauts attempt to use a giant net and Octofloats to keep it from sinking. Meanwhile, Peso and Tweak collaborate on a special brace for its tail, and Kwazii, Dashi and Shellington try to find it enough food. But when the supporting net breaks, the Octonauts have to launch an emergency free-fall rescue!
S5E4Ghost Ship
Dec 31, 202010mThe Octonauts follow a trail of deep-sea debris to its source: a derelict ship floating unmanned on the surface. But the ship seems to be haunted by ghostly voices, which a quick dip below the water line reveals to be hundreds of barnacles stuck to the ship. As the ship drifts into waters too cold for the barnacles, the Octonauts must find a way to tow it to warmer waters before it sinks or falls apart.
S5E5Feeding Frenzy
Jan 1, 202110mWhile exploring a reef, Shellington and Dashi accidentally trigger a feeding frenzy with multiple sharks biting at anything that moves. As Barnacles and Tweak work frantically to plan a rescue, Shellington and Dashi try not to become shark food!
S5E6Sawfish
Jan 2, 202110mWhen Kwazii gets a case of pirate hiccups, he and Peso go up the river in search of a pirate doctor’s treasure that can cure him.
S5E7Nautilus
Jan 3, 202110mKwazii sets off on a monster hunt, and soon encounters a shelled creature called a Nautilus.
S5E8Grey Whales
Jan 4, 202110mThe Octonauts must help reunite a grey whale calf with his mother, keeping him well fed in the meantime.
S5E9Flying Squid
Jan 5, 202110mThe Octonauts meet a flying squid who can help Kwazii's grandfather, Calico Jack, retrieve his treasure.
S5E10Sea Lions
Jan 6, 202110mWhen a wave traps Dashi in a cave with an injured sea lion, the Octonauts and sea lion pack must work together to save them. Using just some rope and a life buoy the pack fights against the waves to save them. Can they save them before it is too late?
S5E11Hawksbill Sea Turtle
Jan 7, 202110mThe Octonauts must guide an ill-stricken hawksbill sea turtle into cooler waters, in order for her to lay healthy eggs.
S5E12Wood Eating Catfish
Jan 8, 202110mWhen Kwazii is found with an injury, he tells the tale of how he and Calico Jack encountered a fish that ate his peg leg.
S5E13Seven Sea Squirts
Jan 9, 202110mThe Octonauts help a band of algae-shooting sea squirts reunite in order to stop an outbreak in the reef.
S5E14Bullfrogs
Jan 10, 202110mWhen the Vegimals accidentally bring bullfrogs into the Octopod, they must rally them up and bring them back home before the Octonauts find out.
S5E15Giant Sea Spiders
Jan 11, 202110mKwazii and Shellington get lost in the Antarctic’s deep seas, before meeting a family of giant sea spiders who may know a way out.
S5E16Great Octo-Bot Rescue
Jan 12, 202110mWhen the Octo-Bots sink into a lake of boiling hot sulfur, Kwazii has to rescue them before the surface hardens.
S5E17Axolotl
Jan 13, 202110mCaptain Barnacles and Kwazii help a pair of singing female axolotls named George's mom (yellow) and George (pink) find a new watering hole, while protecting them from a hungry flock of herons.
S5E18Beavers
Jan 14, 202110mIn order for a school of salmon to reach their nesting area, the Octonauts must enlist help from a family of beavers.
S5E19Zombie Worms
Jan 15, 202111mThe Octolab is being eaten away by a group of zombie worms, tasking the crew with finding a new home for them.
S5E20Mud Volcanoes
Jan 16, 202110mWhile exploring the Mariana Trench, Shellington and Dashi come across a path full of mud volcanoes and a creature in need.
S5E21Tiger Fish and Blind Shrimp
Jan 17, 202110mThe Octonauts encounter a tiger fish and blind shrimp who become separated.
S5E22Fish Mouth Louse
Jan 18, 202110mThe Octonauts help a creature find his louse friend who got lost and could be in trouble.
S5E23Deep Ocean Discovery
Jan 19, 202110mShellington’s sister and nephew, Pearl and Periwinkle, join him on a mission.
S5E24Silver Sea
Jan 20, 202110mThe Octonauts encounter a blob of glowing liquid drifting on the ocean’s surface.
S5E25Bicolour Fangblenny
Jan 21, 202110mThe crew must catch a mysterious fish that’s out to bite every creature in the reef.
S5E26Scaly-Foot Snail
Jan 22, 202110mThe Octonauts meet strong scaly foot snails and enlist them in trying to help save the Octo-Lab from falling into a crevice.
S5E27Chinese Giant Salamander
Jan 23, 202110mThe Octonauts head to the Yangtze River to help Min the Mapmaker, an old friend of Inkling's, who's been trapped by a mysterious creature. Turns out, It was just a Chinese giant salamander protecting her precious eggs, which have fallen ill due to rising water temperatures.
S5E28Bluefin Tuna
Mar 27, 202311mAfter an encounter with a school of migrating tuna, the Octonauts discover that one of the speedy fish, Tina, has been left behind. And she’s injured! Poor Tina has a hook stuck in her mouth and is too weak to swim. After Peso tends to her wound, the Octonauts agree to help get her to the tuna spawning grounds. But they’ll have to be quick: egg-laying season doesn’t last long. Luckily, Tweak’s latest gup, the Gup-R, is the fastest she’s ever built! The Octonauts use it to tow Tina, but when the Gup-R’s battery dies, how will they catch up to the rest of her school?