Episode 1: Octonauts and the Poison Dart Frogs
2015-09-2311 min
When a giant wave hurls Amazon River creatures up into the trees, the Octonauts must get them down safely, without disturbing poison dart frogs who live there.
Season guide
Octonauts Season 4 — Episodes and Where to Watch
24 episodes · first aired 2015-09-23
TMDB does not provide a season overview.
Episode guide
Episode 2: Octonauts and the Hidden Lake
2015-09-2411 min
The Octonauts are exploring Antarctica, when Shellington discovers strange microscopic creatures living under the ice.
Episode 3: Octonauts and the Octopod Mystery
2015-09-2511 min
When the Octopod breaks down, Tweak and the crew search for a missing part aboard an abandoned prototype of the ship, not realising something lives there.
Episode 4: Octonauts and the Baby Sea Turtles
2015-09-2811 min
As newborn baby sea turtles make their way to the ocean, the Octonauts must steer them clear a giant wave and hungry predators.
Episode 5: Octonauts and the Walrus Pups
2015-09-2911 min
Captain Barnacles and his niece and nephew, Ursa and Orson, must rescue walrus pups who are stranded on a runaway ice floe, before it collides with a huge iceberg!
Episode 6: Octonauts and the Mantis Shrimp
2015-09-3011 min
The Octonauts must get 2 mantis shrimp to stop fighting before their powerful claw strikes destroy the Octopod.
Episode 7: Octonauts and the Loneliest Whale
2015-10-0111 min
The Octonauts follow a strange song to a lonely humpback whale.
Episode 8: Octonauts and the Tree Lobsters
2015-10-0211 min
When a storm washes Peso onto a mysterious, rocky island, he meets a band of lobster-like insects thought to be extinct.
Episode 9: Octonauts and the Convict Fish
2015-12-1411 min
The Octonauts evacuate the creatures living around a reef before a large archway collapses, but one stubborn convict fish refuses to move from her burrow.
Episode 10: Octonauts and the Emperor Penguins
2015-12-1611 min
The Octonauts journey across a dangerous expanse of ice to help a penguin mother get back to her family.
Episode 11: Octonauts and the Crawfish
2016-12-0311 min
When a population of crawfish is stricken by illness, the Octonauts race to find a cure.
Episode 12: Octonauts and the Flamingos
2016-12-0411 min
The Octonauts find a lost flamingo chick separated from his family and they have to return him there before hungry alligators do!
Episode 13: Octonauts and the Tiger Shark
2017-05-2711 min
When a hungry tiger shark eats the camera that Tweak's turtle friend Sandy gets in the Octopod, she and the Octonauts must rescue her before it eats everything in its path.
Episode 14: Octonauts and the Sunfish
2017-05-2811 min
When a huge sunfish enters the GUP-E, Peso and Kwazii must somehow get the large fish out of the Gup. Eventually they find out it's a Sunfish a fish with no fins.
Episode 15: Octonauts and the Coelacanth
2017-05-2911 min
While exploring a dark and spooky cave, The Octonauts find a strange fossil of a powerful prehistoric fish... but it may be more than just a fossil!
Episode 16: Octonauts and the Surfing Snails
2017-09-0611 min
When surfing snails are swept out to sea, it's up to Dashi and the Octonauts to save them.
Episode 17: Octonauts and the Yellow Bellied Sea Snakes
2017-09-1311 min
When Peso gets stranded on a beach with a mass of poisonous snakes after a terrible storm, he and the Octonauts must somehow get them back to the ocean.
Episode 18: Octonauts and the Hippos
2017-09-2011 min
Trying to return home from a mission along an African river, the Octonauts have trouble getting past a gang of large, mud-splatting, territorial hippos.
Episode 19: Octonauts and Operation Cooperation
2017-09-2711 min
After Shellington crashes the GUP-D for the 3rd time, he and Kwazii team up with moray eels and grouper fish to help pick up the pieces and fix the vehicle before daylight occurs.
Episode 20: Octonauts and the Bomber Worms
2017-10-2311 min
While diving down to the Midnight Zone, the Octonauts are attacked by bomber worms.
Episode 21: Octonauts and the Kelp Monster Mystery
2017-10-2411 min
Dashi teams up with her little sister Koshi to help the Octonauts solve a mysterious disappearance in the Kelp Forest. This is the second episode in which is unknown who sounded the Octo-Alert.
Episode 22: Octonauts and the Coconut Crisis
2017-10-2511 min
Kwazii takes a vacation on Coconut Island where he gets hit by some coconuts. Then he and the Octonauts must help their old friends the Coconut Crabs discover who's stealing all their coconuts.
Episode 23: Octonauts and the Baby Gator
2017-10-2611 min
Kwazii adopts a baby alligator naming him Nipper, but when it escapes the Octopod, he and the Octonauts must rescue him.
Episode 24: Octonauts and the Spinner Dolphins
2017-10-2711 min
The Octonauts struggle to save a pod of spinner dolphins who seem to be just swimming in their sleep.
Series, season and episode metadata is supplied by TMDB. No season-specific provider claim is made on this page.