• Simon Greenall (speaking)
• Simon Foster (singing)
• Rob Rackstraw
• Paul Panting
• Keith Wickham
• Jo Wyatt
• Teresa Gallagher
• Helen Walsh
• Antonio Aakeel
• Kate Harbour
• William Vanderpuye
• Chipo Chung
• Elena Saurel
• Alan Marriott

• Michael Hefferon
• Steve Jacobson
• Rachel Simon
• Kim Dent Wilder

After being beached on the Skeleton Coast following a storm, the crew encounters Paani, a macaque working as a hydrologist, and soon find themselves working to help a herd ofelephants find water.

During avolcanic eruption in Iceland, a volcano begins melting the ice of the glacier sitting on top of it, threatening to flood a valley below and take out tworeindeer herds unless Dashi, Peso and Paani can evacuate them.

Kwazii sets off to assist Calico Jack in taking a group ofbombardier beetles to a new island home, but they have to find the group's scout first, and he is proving difficult to catch.

After a delivery run to ferry supplies to Professor Natquik in Antarctica, Dashi must fly to a tropical island with Peso and Tweak in tow to help Kwazii and Pete rescue Calico Jack from a pile of trees. However, Dashi has to fly through a fierce windstorm first.

Paani rescues aBailey's snake from amudflow in theHimalayas and calls for backup, which arrives in the form of Dashi, Tweak and Tunip in the new Terra-Gup 1. The group now has to find the snake a new hot spring to call home.

Towards the end of their Australian vacation, Dashi and Koshi receive a weather warning and begin evacuating the local area before aflash flood hits. But after helping twokangaroos and abearded dragon, the duo have to find a pregnant desert crab.

Dashi and Min discover a group ofQuino checkerspot caterpillars while mapping a valley, but while the bugs nap until moreplantains grow, the two must move them and keep them safe with the help of Shellington and Tunip.

Paani calls in for backup when a rockslide begins in the Rocky Mountains, which arrives in the form of Barnacles, Tweak, and a few Vegimals in the new Terra-Gup 2. Unfortunately, they have to evacuate some stubbornmountain goats who are not keen on leaving.

Dashi, Paani, and Tweak follow a developinghurricane to track its direction. When they reveal that the storm is heading for theFlorida Everglades, however, the Octo-Ray gets caught in the fierce winds, preventing them from assisting Ranger Marsh.

Kwazii joins Tracker in a survival test in theSahara Desert. However, a younggolden mole and Kwazii's misplacement of their supplies mean that they quickly encounter problems when asandstorm hits.

Paani discovers a nest of dormice that have prematurely woken from theirhibernation, but when Shellington and Tweak arrive to help, all three have to hurry before the dormice get caught by a hungryweasel.

While on aspelunking expedition in theHang Son Doong caves, Kwazii, Shellington, and Ryla get trapped when an unexpected rainstorm hits and are trapped with anIndochinese tiger.

After Paani gets swept up by a river flood in a rainforest downpour, Dashi and Tweak arrive to check on him and discover a colony of fire ants doing so. Unfortunately, the insects climb onto the Octo-Ray while a bigger storm is approaching.

Peso and Tunip are helping to feed a colony's new pufflings while Kwazii tries to fend off aseagull until Barnacles returns with some missing puffins.

While working with the Octonauts to clear fallen trees in Thailand, Min finds asnag tree home to numerous creatures. Unfortunately, a stubbornsun bear sees it as nothing but a back scratcher, and not willing to give it up causes many problems when the snag is to be moved to avoid him.

Paani finds ahoney badger is hogging awatering hole during thedry season in theAfrican savannah. When they look deeper, though, they find the badger has an injury but is too prideful to accept treatment.

Ranger Marsh wakes up to discover the everglades in the middle of a cold snap, and the Octonauts are dispatched to check on any animals that may be affected by the cold.

Paani finds a long-thought extinctSehuencas water frog and calls for backup in searching for some more inBolivia. Unfortunately, the chances are slim with the given natural hazards.

Professor Natquik returns to his family burrow inSiberia for a long-deserved break, but he discovers a red fox and his kits have made themselves home in it. Now, they're stuck together when the snow falls and buries them.

While studying in winter near theGreat Lakes, Paani encounters aruffed grouse and an ice storm traps him with the bird under the snow. Now, Peso and Tweak have to save him using thesubnivean zone before hungrywolves reach the pair.

While doing research in the mountains, Paani encounters a gosling that keeps jumping off a high cliff... an encounter that quickly spirals into a dramatic adventure for birds.

Ranger Marsh recalls his time checking on the invasiveNile monitor lizards in theNile River.

Kwazii joins Paani on a research expedition in theWithlacoochee River, but when they find a group of stubbornalligators harassed bysharks in aghost forest, Ranger Marsh is required to step in.

While taking shelter from asandstorm, Paani gets distracted by amirage and ends up lost in theArabian Desert. He must follow a group of camels for survival while the other Octonauts search for him.

While working with Paani to set up a weather station inNew Zealand, the Octonauts run afoul of numerouskeas, which becomes problematic when the birds accidentally sabotage the Octo-Ray.

Dashi, Tweak, and Peso help a lone monarch butterfly rejoin his swarm, but a tornado threatens to derail the migration toMexico.