H2O: Just Add Water

Cleo and Rikki face their final year of high school without Emma. They make a new friend in Bella and meet new boy Will - and encounter a strange new force on Mako Island that turns water against them.

Will seeks confirmation of his first experience on Mako Island. Bella volunteers to misdirect his search so he won't find the Moon Pool. The girls and Lewis discover the Moon Pool has changed.

Rikki, Cleo and Lewis think they know everything there is to know about Mako Island, but when water attacks the girls in a full moon, they realise a new, potentially dangerous force is developing on the mysterious island.

Rikki, Cleo and Lewis think they know everything there is to know about Mako Island, but when water attacks the girls in a full moon, they realise a new, potentially dangerous force is developing on the mysterious island.

Rikki, Cleo and Lewis think they know everything there is to know about Mako Island, but when water attacks the girls in a full moon, they realise a new, potentially dangerous force is developing on the mysterious island.

Bella attempts to start a relationship with Will until she sees he's apparently got another girl. Lewis tests the magic Moon Pool water at school and attracts the attention of their Science teacher.

Rikki, Cleo and Lewis think they know everything there is to know about Mako Island, but when water attacks the girls in a full moon, they realise a new, potentially dangerous force is developing on the mysterious island.

Rikki and Bella hide out at Cleo's to protect themselves from a full moon water attack. Bella's kidnapped by a water tentacle and taken to Mako Island. Lewis tries to keep Will away from the island so the girls can rescue her.

Cleo defies Lewis' advice and experiments with the magic Moon Pool water. Using her powers, Rikki accidentally gets the water into Cleo's aquarium and all the girls have to rescue Cleo's fish Hector.

Bella's warned to back off from Will as he's on the trail of the girls' mermaid secrets. She gets too close to him and he finally discovers she's a mermaid.

Rikki, Cleo and Lewis think they know everything there is to know about Mako Island, but when water attacks the girls in a full moon, they realise a new, potentially dangerous force is developing on the mysterious island.

Rikki, Cleo and Lewis think they know everything there is to know about Mako Island, but when water attacks the girls in a full moon, they realise a new, potentially dangerous force is developing on the mysterious island.

Rikki, Cleo and Lewis think they know everything there is to know about Mako Island, but when water attacks the girls in a full moon, they realise a new, potentially dangerous force is developing on the mysterious island.

Will pushes himself too far when Zane challenges him to prove his skills as a free-diver. The girls discover a unique crystal in the rock from the Moon Pool.

Sophie uses Bella‟s idea for a fundraising concert and presents it as her own to Rikki to gain publicity for the cafe. Cleo's caught in the crossfire with Kim when Samantha moves in and puts her stamp on the Sertori home.

Rikki, Cleo and Lewis think they know everything there is to know about Mako Island, but when water attacks the girls in a full moon, they realise a new, potentially dangerous force is developing on the mysterious island.

Rikki, Cleo and Lewis think they know everything there is to know about Mako Island, but when water attacks the girls in a full moon, they realise a new, potentially dangerous force is developing on the mysterious island.

Rikki fears Ryan's explorations on Mako Island will uncover their secrets but Cleo and Bella discount her concern. She almost goes too far trying to stop Ryan from discovering the crystals in the Moon Pool.

Rikki, Cleo and Lewis think they know everything there is to know about Mako Island, but when water attacks the girls in a full moon, they realise a new, potentially dangerous force is developing on the mysterious island.

Zane installs Sophie as head of staff at the cafe. Bella develops a sneezing allergy that also accidentally triggers her powers. Sophie seizes on the problem and looks to fire Bella and the band.

The girls discover the Mako crystals contain immense energy and need to mount a rescue mission when Zane jealously steals one in an effort to gain Rikki's attention.

The girls sit their final school exams and have to avoid a water attack in public when the full moon rises early. They confront the water force in the Moon Pool and are given a message about Mako Island.

Rikki, Cleo and Lewis think they know everything there is to know about Mako Island, but when water attacks the girls in a full moon, they realise a new, potentially dangerous force is developing on the mysterious island.

Rikki, Cleo and Lewis think they know everything there is to know about Mako Island, but when water attacks the girls in a full moon, they realise a new, potentially dangerous force is developing on the mysterious island.