H2O: Just add Water

The full moon comes around again and this time all three girls are affected and travel to Mako Island, where they attack Lewis.

The girls have problems with their new powers and Cleo finds that Lewis isn't helping.

Rikki tries to avoid Zane when he comes back, but needs his help after an incident with a speedboat.

Trouble arises when Emma throws a party to prove she is as fun as Rikki.

Trouble is in the air as the Setori's start to suffer and the JuiceNet is endangered by a new bar.

Cleo is worried when she sees her dad around with another woman.

Everyone is shocked when Cleo is fired at the Ice Cream Stand, and even more so when Lewis takes her place!

Zane is curious by Rikki's reluctance to reveal where she lives.

Emma has to take Eliot for horse riding lessons and the competitive perfectionist tries to be better than the instructor.

Cleo starts to struggle at school and gets help from the new tutor.

In need of cash, Rikki decides to go and searching for a lost statue with a huge reward.

Emma gets poisoned after cutting her finger on some coral and begins to turn into a white scaled monster!

On the night of a full moon, Lewis, Emma, Rikki and Charlotte accompany Cleo's family for a camping trip at Mako.

Cleo decides to restart her friendship with Lewis and embrace her abilities, while Emma is shocked with the new supervisor who has big changes planned.

Zane learns of the myth of Ambergris, a fragrance that can make mermaids fall for any man that wears it.

Lewis is puzzled when he dreams about Cleo being photographed by people.

Its full moon and the girls insist that they don't need Lewis to assist his help as all three girls are staying at Emma's and Ash is coming over.

For the first anniversary of the girls being mermaids, Cleo decides to throw a party.

Lewis is trying to find more information on the moon pool and stumbles across research on it by Max Hamilton from fifty years ago.

Charlotte demands answers to why Lewis is hanging out with the girls so much.

Charlotte's stubborn nature and thirst for knowledge leads her to Max, who confirms her suspicions and leads her to the Moon Pool.

The girls decide that they should accept Charlotte, and the four work together when they need to join the volleyball team to avoid failing Physical Education.

Charlotte is determined to prove her love for Lewis and show that she is better than the other three mermaids, refusing their advice and taking matters into her own hands when Nate causes trouble for Lewis.

More friction arises, this time over Lewis' birthday party.

Angry over the short friendship with the girls, Charlotte forces Lewis to choose between her and his friends.