However, Cleo might need his help after all when she takes a risk and attends Miriam's pool party, only to get thrown in the pool by prankster Zane Bennett and his pal Nate, just as Lewis arrives. Meanwhile, Cleo wants to tell her friend, Lewis, about her powers, but Emma and Rikki forbid it. Rikki soon gets fed up with their moaning, storms off and accidentally discovers a power of her own. Emma's swimming career is in jeopardy, and Cleo feels isolated when she realises that she can't go to fashionable Miriam's pool party. While Rikki enjoys her new life as a mermaid, Emma and Cleo are less enthusiastic about their mermaid powers. Cleo and Emma discover that they have powers to control water. Ten seconds after they touch water, they turn into mermaids. Little do they know, as they swim out of the tunnel and are rescued by the water police, that they have undergone a magical transformation, and their lives will never be the same again. Realising that the pool, which has an underwater tunnel connected to the ocean, is their only way out, the girls step into the water and find themselves bathed in the light of the full moon as it passes over the top of the volcano. Once there, they discover a hidden cavern, and inside it, a deep pool of water, sitting within the cone of a volcano. Three fifteen-year-old girls-Emma Gilbert, Rikki Chadwick, and Cleo Sertori-find themselves stranded out at sea in a dinghy, and drift onto the beaches of Mako Island.

In reality, they were only temporarily removed of their powers. When he realises what he has done, Zane works with Lewis to free the girls who trick the scientists into believing they have given up their powers during a lunar eclipse. Zane later helps her to capture the girls, unaware of their true identities. Doctor Denman ( Lara Cox), a marine biologist, also becomes focused on the mermaids when Lewis accidentally leaves behind a genetic sample of the girls he was working on in her lab. During the rescue, Zane catches a glimpse of her tail and becomes obsessed with finding this 'sea monster'.

Chatham, Zane Bennett (Burgess Abernethy) gets trapped on her sinking houseboat which forces Emma to rush to his aid. She helps the girls understand their own situation and warns them of the dangers involved. The girls meet Louise Chatham ( Christine Amor), an older woman who reveals that she too was once a mermaid. The first series features a single primary storyline with three main elements. The series focuses on the girls dealing with everyday teen problems while trying to cope with their newfound abilities. The girls enlist Cleo's long-time friend Lewis McCartney ( Angus McLaren) to try to determine why this has happened to them and help them keep their new identity a secret. Emma can freeze water, Cleo can control the shape and volume of water, and Rikki can boil water. After further experimentation, they discover they also have unique supernatural powers over water. After being rescued the girls return to their normal lives but soon discover they have changed: seconds after contact with water they transform into mermaids. When they enter an underground pool of water that leads to the ocean they find themselves bathed in the glow of moonlight from overhead. Įpisodes Series one (2006) Įmma Gilbert ( Claire Holt), Cleo Sertori ( Phoebe Tonkin) and Rikki Chadwick ( Cariba Heine) are three teenage girls who become stranded on the mysterious Mako Island. The third series premiered in the United Kingdom on 26 October 2009 while its Australian premiere occurred on. Series one premiered in Australia on 7 July 2006 and series two began there on 28 September 2007. The following is an episode list for the Australian television show H 2O: Just Add Water, which first aired on Network Ten in Australia and has since been broadcast in more than 120 countries worldwide.

H20 just add water season 4 episode 1