The Octonauts Season 4 Episode 2 - The Hidden Lake
Episode(s)
- Episode 24 - The Sunfish
- Episode 23 - The Spinner Dolphins
- Episode 22 - The Hippos
- Episode 21 - The Tiger Shark
- Episode 20 - The Coelacant
- Episode 19 - The Coconut Crisis
- Episode 18 - The Yellow Belly Sea Snakes
- Episode 17 - The Kelp Monster Mystery
- Episode 16 - Octonauts and Operation Cooperation
- Episode 15 - The Flamingos
- Episode 14 - The Surfing Snails
- Episode 13 - The Crawfish
- Episode 12 - The Bomber Worms
- Episode 11 - The Baby Alligator Search
- Episode 10 - The Emperor Penguins
- Episode 9 - The Convict Fish
- Episode 8 - The Tree Lobsters
- Episode 7 - The Loneliest Whale
- Episode 6 - The Mantis Shrimp
- Episode 5 - The Walrus Pups
- Episode 4 - The Baby Sea Turtles
- Episode 3 - The Octopod Mystery
- Episode 2 - The Hidden Lake
- Episode 1 - The Poison Dart Frogs