Poison Dart Frogs / Hidden Lake

Part 1: Poison Dart Frogs

• The Octonauts spot a tidal bore, or a large wave, moving up the Amazon river. Worried that creatures might get hurt or thrown onto shore, they head to the river to help.
• When they get to the river, they find some Amazon dart frogs calling out to them from a tree. The Octonauts meet Robert Robert, a poison dart frog who tells them about their bright and poisonous skin.
• The poison dart frogs tell them that fish have been thrown into their tree’s puddles. They need to hurry and get the fish out because the frogs’ eggs are about to hatch into tadpoles that need those puddles to swim in.
• Captain Barnacles calls the rest of the Octonauts at HQ and tells them about the problem. Turnip flies the GUP-H, a new helicopter they’ve built, to rescue some of the fish from the tall tree.
• The group works together to rescue the fish, and the frogs transport their tadpoles to the puddles as they hatch.
• When Robert Robert slips and nearly falls off the tree, Quazi catches him in a bucket while hanging from the helicopter and safely carries him and his tadpole to a puddle.

Part 2: Hidden Lake

• The Octonauts are in Antarctica, and they see a frozen waterfall made of red ice. Curious to learn what’s under the thick ice, they use the drill on their GUP-S submarine to dig a tunnel through the ice.
• The Octonauts swim around and explore the lake beneath the ice, which is red because it contains rusty iron. Shellington is discouraged that creatures wouldn’t be able to live in the cold and dark water, and he appears upset when they return to the GUP-S without finding any creatures.
• The rest of the Octonauts go to sleep, but Shellington stays awake and investigates a sample of water that he got from the lake. A voice calls out to him, and he meets a tiny microbe that had been living in the water. The microbe asks him to return him to the lake because the GUP-S is too warm and bright for him to live.
• Shellington heads back into the lake, and the microbe leads him to his home to introduce him to the other microbes. The microbes explain that they can live in the lake because they get energy from the rust in the water.
• Shellington realizes that he doesn’t know how to find his way back, and he makes a “mayday” call back to the ship. Captain Barnacles and Quazi come find him in the lake, and the group escapes back onto the surface just before the ice opening freezes over.