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• S1.E1 ∙ The Whale Shark
• S1.E2 ∙ The Undersea Storm
• S1.E3 ∙ The Crab and Urchin
• S1.E4 ∙ The Walrus Chief
• S1.E5 ∙ The Flying Fish
• S1.E6 ∙ The Giant Squid
• S1.E7 ∙ The Orcas
• S1.E8 ∙ Octonauts and the Great Algae Escape
• S1.E9 ∙ Octonauts and the Remipedes
• S1.E10 ∙ Octonauts and the Speedy Sailfish
• S1.E11 ∙ Octonauts and the Blobfish Brothers
• S1.E12 ∙ Octonauts and the Monster Map
• S1.E13 ∙ Octonauts and the Lost Sea Star
• S1.E14 ∙ Octonauts and the Albino Humpback Whale
• S1.E15 ∙ Octonauts and the Giant Kelp Forest
• S1.E16 ∙ Octonauts and the Enemy Anemones
• S1.E17 ∙ The Narwhal
• S1.E18 ∙ The Midnight Zone
• S1.E19 ∙ The Snapping Shrimp
• S1.E20 ∙ The Snot Sea Cucumber
• S1.E21 ∙ The Giant Whirlpool
• S1.E22 ∙ The Hermit Crabs
• S1.E23 ∙ The Mixed Up Whales
• S1.E24 ∙ The Kelp Forest Rescue
• S1.E25 ∙ The Decorator Crab
• S1.E26 ∙ The Beluga Whales
• S1.E27 ∙ The Hungry Pilot Fish
• S1.E28 ∙ The Vampire Squid
• S1.E29 ∙ The Seahorse Tale
• S1.E30 ∙ The Giant Jelly
• S1.E31 ∙ The Cookiecutter Sharks
• S1.E32 ∙ The Oarfish
• S1.E33 ∙ The Combtooth Blenny
• S1.E34 ∙ The Jellyfish Bloom
• S1.E35 ∙ The Baby Dolphin
• S1.E36 ∙ The Scary Spookfish
• S1.E37 ∙ The Arctic Orcas
• S1.E38 ∙ The Slime Eels
• S1.E39 ∙ The Enormous Elephant Seal
• S1.E40 ∙ The Sardine School
• S1.E41 ∙ The Dolphin Reef Rescue
• S1.E42 ∙ The Eel Ordeal
• S1.E43 ∙ The Marine Iguanas
• S1.E44 ∙ The Dwarf Lanternshark
• S1.E45 ∙ The Pirate Parrotfish
• S1.E46 ∙ The Electric Torpedo Ray
• S1.E47 ∙ The Crafty Cuttlefish
• S1.E48 ∙ The Lost Lemon Shark
• S1.E49 ∙ The Humuhumunukunukuapua'a
• S1.E50 ∙ The Giant Spider Crab