#1. The Octonauts and the Penguin Brothers' Adventure: Peso's younger brother, Pinto, is stranded in the melting waters of the Antarctic. Upon hearing the news, Peso rushes to the rescue in the Terra 4, now equipped with a snowmobile function! Can they escape the Antarctic, home to fierce orcas and elephant seals? #2. The Octonauts and the Permafrost Expedition: Octo-Agent Pearly is exploring northern Canada when she discovers that the permafrost, which should be frozen, is melting, triggering an Octo-Alert. The Octonauts, who were delivering hay to reindeer, quickly launch a mission to refreeze the permafrost! #3. The Octonauts and the Snowshoe Hare: Winter arrives too early due to extreme weather changes. Before the snowshoe hares' fur can turn white for camouflage, the forest is already covered in snow. It's time for Tweak's new exploration vehicle, the Terra 7, to take action! #4. The Octonauts and the Ringed Seal: Octo-Agents Pearly, Periwinckle, and Pony are checking on Arctic animals. However, the ice is thinning, and there's no snow, causing the ringed seals' homes to melt. Captain Barnacles and the Octonauts decide to make snow in the Arctic! #5. The Octonauts and the Blizzard Training: Barnacles takes his nephews on a blizzard training exercise with polar bear scouts. Suddenly, an unexpected and massive blizzard hits, and communications are cut off. Can Barnacles safely escape this perilous situation?