Season 4

A solar storm throws off some whales’ senses of direction, as well as the Octonauts.

Tracker and Kwazii help some fish whose food keeps getting stolen by a frigatebird.

When Selva encounters an injured creature, Peso journeys to provide medical aid.

The Octonauts help when they discover melting permafrost endangering an ecosystem.

When a rainstorm surges, the Octonauts contend with an oncoming mudslide.

The Octonauts help a colony of honeybees that are trapped in a sinking tree.

While in search of a boiling river, Kwazii and Paani meet some tamarin monkeys.

When a fire threatens a meerkat burrow, the Octonauts must put it out.

Arctic ringed seals are threatened when warming temperatures diminish their snow caves.

The Octonauts assist an alpine swift to catch up with its flock.

A baby elephant separated from its herd needs the Octonauts' help swimming to safety.

While collecting pictures, Dashi and Shellington get trapped in a flooding cave.

The Octonauts must clear a logjam while protecting a family of birds.

When a blizzard hits, Captain Barnacles will need to use all his Arctic survival tactics.

A replanting mission is interrupted when a gazelle goes missing just as a sandstorm hits.

The Octonauts help rebuild some mudflats while reuniting a lost bird with its flock.

Two dolphins get stuck in a coastal saltwater lake during low tide.

Kwazii and Periwinkle try to help a bird found in the Sonoran Desert.

The Octonauts must repair a coral reef protecting a lagoon from surrounding sharks.

The Octonauts and Octo-Agents work together to clean up the Great Pacific Garbage Patch.

When the underwater Kavachi volcano erupts, Ryla calls on the Octonauts to help.

Tracker and Koshi’s bird-studying mission is upended when a mysterious egg appears.

The Octonauts identify a mysterious creature that turns out to be a spider crab in need.

When the Reef Base’s power is knocked out, Octo-Agents lead the charge to restore it.