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Season 4 Episodes
25 episodes
1
Solar Storm
A solar storm throws off some whales’ senses of direction, as well as the Octonauts.
2
Frigatebird
Tracker and Kwazii help some fish whose food keeps getting stolen by a frigatebird.
3
Madagascar Tsingy
When Selva encounters an injured creature, Peso journeys to provide medical aid.
4
Permafrost Problem
The Octonauts help when they discover melting permafrost endangering an ecosystem.
5
Mudslide
When a rainstorm surges, the Octonauts contend with an oncoming mudslide.
6
Honeybees
The Octonauts help a colony of honeybees that are trapped in a sinking tree.
7
Boiling River
While in search of a boiling river, Kwazii and Paani meet some tamarin monkeys.
8
Kalahari Copycat
When a fire threatens a meerkat burrow, the Octonauts must put it out.
9
Ringed Seals
Arctic ringed seals are threatened when warming temperatures diminish their snow caves.
10
Alpine Swift
The Octonauts assist an alpine swift to catch up with its flock.
11
Elephant Swim Lesson
A baby elephant separated from its herd needs the Octonauts' help swimming to safety.
12
Hazardous Habitats
While collecting pictures, Dashi and Shellington get trapped in a flooding cave.
13
Iguazu Falls
The Octonauts must clear a logjam while protecting a family of birds.
14
Arctic Blizzard
When a blizzard hits, Captain Barnacles will need to use all his Arctic survival tactics.
15
Gobi Desert
A replanting mission is interrupted when a gazelle goes missing just as a sandstorm hits.
16
100
Caddisfly Silk
On a mission to study caddisfly silk, Bud and Paani get washed down a river.
17
Mudflat Mission
The Octonauts help rebuild some mudflats while reuniting a lost bird with its flock.
18
Lost Bottlenose Dolphins
Two dolphins get stuck in a coastal saltwater lake during low tide.
19
Desert Creatures
Kwazii and Periwinkle try to help a bird found in the Sonoran Desert.
20
Hawaiian Monk Seals
The Octonauts must repair a coral reef protecting a lagoon from surrounding sharks.
21
Great Pacific Clean-up
The Octonauts and Octo-Agents work together to clean up the Great Pacific Garbage Patch.
22
Volcano Sharks
When the underwater Kavachi volcano erupts, Ryla calls on the Octonauts to help.
23
Billabong Mystery
Tracker and Koshi’s bird-studying mission is upended when a mysterious egg appears.
24
Spider Crab Surprise
The Octonauts identify a mysterious creature that turns out to be a spider crab in need.
25
Mysterious Webs
When the Reef Base’s power is knocked out, Octo-Agents lead the charge to restore it.