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.

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. 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.