- 6.8/109 votes
#1 - Octonauts and the Walrus Pups
Season 4 Episode 1 - Aired 9/29/2015
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!
Director: N/A
Writer: N/A
- 7.6/108 votes
#2 - Octonauts and the Mantis Shrimp
Season 4 Episode 2 - Aired 9/30/2015
The Octonauts must get 2 mantis shrimp to stop fighting before their powerful claw strikes destroy the Octopod.
Director: N/A
Writer: N/A
- 8.3/107 votes
#3 - Octonauts and the Poison Dart Frogs
Season 4 Episode 3 - Aired 9/23/2015
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.
Director: N/A
Writer: N/A
- 7.7/106 votes
#4 - Octonauts and the Hidden Lake
Season 4 Episode 4 - Aired 9/24/2015
The Octonauts are exploring Antarctica, when Shellington discovers strange microscopic creatures living under the ice.
Director: N/A
Writer: N/A
- 7.6/107 votes
#5 - Octonauts and the Baby Sea Turtles
Season 4 Episode 5 - Aired 9/28/2015
As newborn baby sea turtles make their way to the ocean, the Octonauts must steer them clear a giant wave and hungry predators.
Director: N/A
Writer: N/A
- 7.4/109 votes
#6 - Octonauts and the Octopod Mystery
Season 4 Episode 6 - Aired 9/25/2015
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.
Director: N/A
Writer: N/A
- 7.6/105 votes
#7 - Octonauts and the Tree Lobsters
Season 4 Episode 7 - Aired 10/2/2015
When a storm washes Peso onto a mysterious, rocky island, he meets a band of lobster-like insects thought to be extinct.
Director: N/A
Writer: N/A
- 7.4/107 votes
#8 - Octonauts and the Convict Fish
Season 4 Episode 8 - Aired 12/14/2015
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.
Director: N/A
Writer: N/A
- 7.7/109 votes
#9 - Octonauts and the Crawfish
Season 4 Episode 9 - Aired 12/3/2016
When a population of crawfish is stricken by illness, the Octonauts race to find a cure.
Director: N/A
Writer: N/A
- 7.8/105 votes
#10 - Octonauts and the Surfing Snails
Season 4 Episode 10 - Aired 9/6/2017
When surfing snails are swept out to sea, it's up to Dashi and the Octonauts to save them.
Director: N/A
Writer: N/A
- 7.7/106 votes
#11 - Octonauts and the Baby Gator
Season 4 Episode 11 - Aired 10/26/2017
Kwazii adopts a baby alligator naming him Nipper, but when it escapes the Octopod, he and the Octonauts must rescue him.
Director: N/A
Writer: N/A
- 7.3/107 votes
#12 - Octonauts and the Bomber Worms
Season 4 Episode 12 - Aired 10/23/2017
While diving down to the Midnight Zone, the Octonauts are attacked by bomber worms.
Director: N/A
Writer: N/A
- 7.3/107 votes
#13 - Octonauts and the Flamingos
Season 4 Episode 13 - Aired 12/4/2016
The Octonauts find a lost flamingo chick separated from his family and they have to return him there before hungry alligators do!
Director: N/A
Writer: N/A
- 7.0/106 votes
#14 - Octonauts and Operation Cooperation
Season 4 Episode 14 - Aired 9/27/2017
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.
Director: N/A
Writer: N/A
- 6.8/105 votes
#15 - Octonauts and the Kelp Monster Mystery
Season 4 Episode 15 - Aired 10/24/2017
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.
Director: N/A
Writer: N/A
- 7.4/105 votes
#16 - Octonauts and the Hippos
Season 4 Episode 16 - Aired 9/20/2017
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.
Director: N/A
Writer: N/A
- 7.7/106 votes
#17 - Octonauts and the Yellow Bellied Sea Snakes
Season 4 Episode 17 - Aired 9/13/2017
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.
Director: N/A
Writer: N/A
- 6.8/106 votes
#18 - Octonauts and the Loneliest Whale
Season 4 Episode 18 - Aired 10/1/2015
The Octonauts follow a strange song to a lonely humpback whale.
Director: N/A
Writer: N/A
- 7.0/105 votes
#19 - Octonauts and the Spinner Dolphins
Season 4 Episode 19 - Aired 10/27/2017
The Octonauts struggle to save a pod of spinner dolphins who seem to be just swimming in their sleep.
Director: N/A
Writer: N/A
- 7.8/109 votes
#20 - Octonauts and the Coelacanth
Season 4 Episode 20 - Aired 5/29/2017
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!
Director: N/A
Writer: N/A
- 7.6/107 votes
#21 - Octonauts and the Emperor Penguins
Season 4 Episode 21 - Aired 12/16/2015
The Octonauts journey across a dangerous expanse of ice to help a penguin mother get back to her family.
Director: N/A
Writer: N/A
- 7.5/106 votes
#22 - Octonauts and the Tiger Shark
Season 4 Episode 22 - Aired 5/27/2017
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.
Director: N/A
Writer: N/A
- NaN/100 votes
#23 - Octonauts and the Coconut Crisis
Season 4 Episode 23 - Aired 10/25/2017
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.
Director: N/A
Writer: N/A
- 6.6/105 votes
#24 - Octonauts and the Sunfish
Season 4 Episode 24 - Aired 5/28/2017
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.
Director: N/A
Writer: N/A
The Best Episodes of Octonauts Season 4
Every episode of Octonauts Season 4 ranked from best to worst. Discover the Best Episodes of Octonauts Season 4!
The Octonauts is a British children's television series, produced by Silvergate Media for the BBC channel Cbeebies. The series is animated in Ireland by Brown...
Genres:KidsAnimationAction & Adventure
Season 4 Ratings Summary
"Octonauts and the Walrus Pups" is the best rated episode of "Octonauts" season 4. It scored 6.8/10 based on 9 votes. Directed by N/A and written by N/A, it aired on 9/29/2015. This episode is rated 0.8 points higher than the second-best, "Octonauts and the Mantis Shrimp".