Season 5

01 Blue Whale Rescue Episode 130th December 2020 When 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! 02 Bluefin Tuna Episode 227th March 2023 After 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? 03 Whales of Mystery Episode 328th December 2020 Shellington 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. 04 Ghost Ship Episode 431st December 2020 The 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. 05 Feeding Frenzy Episode 51st January 2021 While 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! 06 Sawfish Episode 62nd January 2021 When 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. 07 Nautilus Episode 73rd January 2021 Kwazii sets off on a monster hunt, and soon encounters a shelled creature called a Nautilus. 08 Grey Whales Episode 84th January 2021 The Octonauts must help reunite a grey whale calf with his mother, keeping him well fed in the meantime. 09 Flying Squid Episode 95th January 2021 The Octonauts meet a flying squid who can help Kwazii's grandfather, Calico Jack, retrieve his treasure. 10 Sea Lions Episode 106th January 2021 When 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? 11 Hawksbill Sea Turtle Episode 117th January 2021 The Octonauts must guide an ill-stricken hawksbill sea turtle into cooler waters, in order for her to lay healthy eggs. 12 Wood Eating Catfish Episode 128th January 2021 When Kwazii is found with an injury, he tells the tale of how he and Calico Jack encountered a fish that ate his peg leg. 13 Seven Sea Squirts Episode 139th January 2021 The Octonauts help a band of algae-shooting sea squirts reunite in order to stop an outbreak in the reef. 14 Bullfrogs Episode 1410th January 2021 When the Vegimals accidentally bring bullfrogs into the Octopod, they must rally them up and bring them back home before the Octonauts find out. 15 Giant Sea Spiders Episode 1511th January 2021 Kwazii and Shellington get lost in the Antarctic’s deep seas, before meeting a family of giant sea spiders who may know a way out. 16 Great Octo-Bot Rescue Episode 1612th January 2021 When the Octo-Bots sink into a lake of boiling hot sulfur, Kwazii has to rescue them before the surface hardens. 17 Axolotl Episode 1713th January 2021 Captain 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. 18 Beavers Episode 1814th January 2021 In order for a school of salmon to reach their nesting area, the Octonauts must enlist help from a family of beavers. 19 Zombie Worms Episode 1915th January 2021 The Octolab is being eaten away by a group of zombie worms, tasking the crew with finding a new home for them. 20 Mud Volcanoes Episode 2016th January 2021 While exploring the Mariana Trench, Shellington and Dashi come across a path full of mud volcanoes and a creature in need. 21 Tiger Fish and Blind Shrimp Episode 2117th January 2021 The Octonauts encounter a tiger fish and blind shrimp who become separated. 22 Fish Mouth Louse Episode 2218th January 2021 The Octonauts help a creature find his louse friend who got lost and could be in trouble. 23 Deep Ocean Discovery Episode 2319th January 2021 Shellington’s sister and nephew, Pearl and Periwinkle, join him on a mission. 24 Silver Sea Episode 2420th January 2021 The Octonauts encounter a blob of glowing liquid drifting on the ocean’s surface. 25 Bicolour Fangblenny Episode 2521st January 2021 The crew must catch a mysterious fish that’s out to bite every creature in the reef. 26 Scaly-Foot Snail Episode 2622nd January 2021 The Octonauts meet strong scaly foot snails and enlist them in trying to help save the Octo-Lab from falling into a crevice. 27 Chinese Giant Salamander Episode 2723rd January 2021 The 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.