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Series 5: 4. Ghost Ship
The Octonauts follow a trail of deep-sea debris to its source: a derelict ship floating unmanned on the surface. But the ship seems to be haunted by ghostly voices, which a quick dip below the water line reveals to be hundreds of barnacles stuck to the ship. As the ship drifts into waters too cold for the barnacles, the Octonauts must find a way to tow it to warmer waters before it sinks or falls apart.
Source: CBeebies
Most recent episodes of Octonauts
Octonauts
Series 1 - The Snapping Shrimp
Animated deep-sea adventures with Captain Barnacles and his explorers. The Octonauts encounter a snapping shrimp.
19-01-2026
CBeebies
Octonauts
Series 3 - Pelicans
Animated deep sea adventures with Captain Barnacles and his explorers. A floating garbage patch endangers a flock of pelicans and other sea creatures.
19-01-2026
CBeebies
Octonauts
Series 1 - The Electric Torpedo Rays
Animated deep-sea adventures with Captain Barnacles and his explorers. The Octonauts give their ship a jump-start with some electric torpedo rays.
18-01-2026
CBeebies
Octonauts
Series 1 - The Giant Jelly
Animated deep sea adventures with Captain Barnacles and his explorers. The Octonauts must rescue Peso when he gets trapped inside a giant comb jelly.
18-01-2026
CBeebies
Octonauts
Series 1 - The Pirate Parrotfish
Animated deep-sea adventures. The Octonauts go on a pirate treasure hunt, and Kwazii meets the perfect sidekick - a parrotfish!
17-01-2026
CBeebies
Octonauts
Series 1 - The Seahorse Tale
Animated deep sea adventures with Captain Barnacles and his explorers. After a storm, the Octonauts have to reunite a seahorse with its missing mate.
17-01-2026
CBeebies
Octonauts
Series 1 - The Midnight Zone
Animated deep-sea adventures with Captain Barnacles and his explorers. The Octonauts discover a strange rock that happens to be home to a new species of worm.
16-01-2026
CBeebies
Octonauts
Series 3 - Humpback Whales
Animated deep-sea adventures with Captain Barnacles and his explorers. When a sardine swallows an important key, a humpback whale helps Kwazii track it down.
16-01-2026
CBeebies
Octonauts
Series 1 - The Narwhal
Animated deep sea adventures with Captain Barnacles and his fellow explorers. While sailing the Arctic, the Octonauts' ship, the Octopod, gets trapped in the ice.
15-01-2026
CBeebies
Octonauts
Series 3 - Artificial Reef
Animated deep sea adventures with Captain Barnacles and his explorers. Tweak and her crewmates must convert the Gup-F into an artificial reef.
15-01-2026
CBeebies
Most popular episodes of Octonauts
Octonauts
Series 5: 1. Blue Fin Tuna
After an encounter with a school of migrating tuna, the Octonauts discover that one of the speedy fish, Tina, has been left behind. And she’s injured! Poor Tina has a hook ...
16-12-2025
CBeebies
Octonauts
Series 1 - The Narwhal
Animated deep sea adventures with Captain Barnacles and his fellow explorers. While sailing the Arctic, the Octonauts' ship, the Octopod, gets trapped in the ice.
15-01-2026
CBeebies
Octonauts
Octonauts Special: The Amazon Adventure
Animated series. In this special episode, the Octonauts travel deep down the Amazon river in search of a lost city - and Kwazii's long-lost grandfather, Calico Jack!
29-10-2025
CBeebies
Octonauts
The Over, Under Adventure
Animated deep sea adventure series. The Octonauts' mission to explore Antarctica becomes a desperate rescue as a group of sea stars and urchins are threatened by a brinicle.
15-08-2024
CBeebies
Octonauts
Series 3 - Yeti Crab
Animated deep sea adventures with Captain Barnacles and his explorers. A yeti crab damages the ship, endangering itself and the Octonauts.
24-10-2025
CBeebies
Octonauts
Series 1 - The Hermit Crabs
Animated deep sea adventures. When the crew can't return to base, Peso and Tweak have to help a hermit crab escape from its shell.
21-12-2025
CBeebies