Episode list

In her sleep Cleo creates huge spheres of water that float through the air in Dolphin City, causing chaos. This strange phenomenon is caused by her worries about her Dad, who is on a mission out at sea. And what if Cleo's worries are real? What if her Dad really has fallen into the hands of dangerous outlaws involved in illegal fishing?

The girls find some turtle eggs on Dolphin City beach: they are too fragile to move, so they take turns watching over them till they hatch. But that's not counting with Miriam and Zane - who are having a beach party!! Meanwhile, underwater, Bernie, cannot bear all the noise and disruption his neighbors are making, and decides to leave his cave and go and stay elsewhere for a bit of a rest. But Murray and the Vandal Gang take advantage of his absence to move into his home.

The White Mermaid is in danger! Her sanctuary, the sunken galleon of Edward the Cruel, is about to be discovered by Stanley Finch, the famous explorer. The girls decide to stop him, and make his boat take another course, towards the sinister underwater stone circle. Stanley dives to have a look, but when he comes back, he is completely transformed: talking like a pirate of the high seas, he believes he is Edward the Cruel himself!

After being carried by a current into the underwater stone circle, Rikki is victim of a terrible spell: she cannot turn back into a human! To break the spell, she has to wait for the full moon - in three days' time! Three days, during which Rikki has to live underwater 24 hours a day, with the fish! Meanwhile her Dad is convinced she has run away and is getting more and more worried.

The Bay prepares for a great excitement: there's soon to be the first great robotics competition organized by the Dolphin City University. The events will take place underwater, and Lewis wants badly to win first prize: enrolment in the Science Faculty! Unfortunately, Zane is also participating, and true to form, can only do it by cheating. But the girls are most worried about all their underwater friends - how are they going to survive a horde of home-built robots running round the Bay?

Emma's kid brother Elliott happened to see Rikki's mermaid tail in the water! He starts telling everyone he's seen a sea monster. To cover up, the girls and Lewis start building a fake monster, to make people think it was all a hoax. But it's too late - the whole town's out looking for the famous "Dolphin City Monster". Meanwhile underwater Bernie has injured his claw: unaware of all the commotion in the bay, he is waiting for the girls who promised to come help him. Murray takes advantage of Bernie's injury to make him doubt the girls' loyalty, in order to recruit him in the Vandal Gang.

The Vandals are carrying out a nasty plan: they have enlisted a terrible horde of stinging jellyfish to sow terror in the Bay. But the mermaids aren't able to respond: Rikki grounded, wrongly accused of calling in a fire alarm at school, and Cleo has to help care for swimmers stung by the jellies. Before they can recover the Bay, deserted by its terrified underwater inhabitants, the mermaids have to clear Rikki's name and find the real culprit: Miriam, who was trying to skip class to go to the sales! Then they can go fight the Vandals and their jellyfish, discovering on the way an unexpected ally: the fearsome giant octopus, awakened in a bad mood by the stinging jellyfish: the octopus goes on the warpath and hunts down the little stingers. End of the reign of the Vandals!