When Lewis tells Cleo not to experiment with the floating water they collected from Mako, she cannot resist, and sends Lewis off for a day of golfing with her father, so that he won't discover her. But when Rikki accidentally gets the water in Cleo's fish tank, her goldfish, Hector, becomes imprisoned in a bubble of floating water! The girls' attempts to free Hector result in him going down the drain, and they must use their mermaid abilities to retrieve him from the canal. Also, the girls try to keep Will, who is in the house while looking for Bella with whom he has to do a project for school, from seeing Hector. Meanwhile, somewhere on the golf course, Lewis is pretending to lose to Cleo's father at golf, so that he can get into his good books. 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. Series one premiered in Australia on 7 July 2006 and series two began there on 28 September 2007. The third series premiered in the United Kingdom on 26 October 2009 while its Australian premiere occurred on 22 May 2010. A new girl, Charlotte Watsford, moves to the Gold Coast, and it is evident that she is developing a crush on Cleo's boyfriend, Lewis. But Charlotte may soon have her chance, as Cleo is getting fed up with Lewis' constant, smothering concern for her, and is considering breaking up with him. Meanwhile, the girls are still trying to learn how to control their powers, and Emma in particular is put to the test when she sees Elliot being bullied by a member of his soccer team. Furious when she sees the boy (Nate's little brother), shove Elliot in the middle of a game, Emma then executes total control of her newfound powers... by making the boy slip on a sheet of ice. But elsewhere, Cleo makes the tough decision to break up with Lewis.

Cleo counts down the days to her sixteenth birthday, not with excitement, but with dread. Emma and Rikki can't understand Cleo's mood, until Lewis tells them about Cleo's father's embarrassing birthday parties. Meanwhile, Zane is determined to find the "sea monster" that saved him from drowning, and recruits Lewis to help him. But Lewis has promised the girls that he will keep Zane as far away from Mako Island and them as possible. Cleo is devastated when she fails a biology exam, and realises that it was all because she did not have Lewis to tutor her. Cleo's father then schedules Cleo a re-sit for the exam, and also finds her a new tutor... Charlotte. Determined to keep Cleo and Lewis apart, Charlotte sets Cleo a whole weekend of studying, and then takes Lewis to paint with her... on Mako Island. The girls try to stop Lewis from taking her there, but he refuses, thinking they are being paranoid. Cleo sneaks off from studying to go with Emma and Rikki to Mako, and try to keep Charlotte from discovering too much. But she ends up with her heart broken when she falls into a stream, and looks up to see Lewis kissing Charlotte (not realising that he only did it to stop Charlotte from seeing her as a mermaid). When Rikki and Cleo realise that Will has made a connection between Bella, Mako, and the full moon, they warn Bella to stay away from him, but she can't. Will is also growing incredibly interested in her, and wants to spend time with her; but when he realises that Bella won't swim, he deliberately spills some water on her, thinking her secret might be something to do with water. In a panic, Bella dives into the water, but Will follows her... and discovers that she is a mermaid. Afterwards, Bella tells Will how she became a mermaid. Can he keep her secret?

Lewis and the girls enter a short film contest held at the JuiceNet cafe, but Lewis, last year's champion, is fresh out of ideas. Rikki and Cleo are roped into doing a film about Emma's mother, but Rikki, thinking that the film is boring, sneaks off to shoot her own film, featuring some impressive underwater footage of sharks. Meanwhile, Zane, ineligible to compete himself, as his father is on the judging panel, recruits Lewis to shoot a film of him windsurfing around Mako Island, recreating (and hopefully beating), his father's windsurfing record of several years before. But things don't go to plan, when Zane falls off his windsurfer, right in the middle of Mako Island's shark breeding ground. When Cleo's young cousin Angela comes to stay, Cleo's father gives Cleo the responsibility of taking care of her, hoping it will distract Cleo from arguing with her sister Kim. But taking care of Angela brings on challenges of its own, as it appears she is a spoiled brat, who is determined to get what she wants, and, worst of all, has a fondness for water. Rather than taking Angela to the beach to go body boarding, Cleo instead takes her to the safety of the marine park to look at the pelicans Kim is so fond of. But things soon turn bad, when Angela goes missing, and Cleo and the others find a pelican in her house, which Cleo accuses Kim of stealing from the marine park. The real thief turns out to be Angela, who used the pelican as a distraction so that she could go body boarding. As punishment, Cleo makes Angela clean up after the pelicans at the marine park. Cleo and Kim are concerned when it seems that their father has found a new girlfriend. With no desire for a step-mother, the girls are horrified when their father invites the woman over for dinner; but Cleo is even more horrified to discover that she is Charlotte's mother! Feeling that desperate times call for desperate measures, Cleo invites Rikki and Emma round, and persuades them to use their powers to ruin her father's dinner. Only afterwards do the girls realise their mistake; Charlotte's mother was a business associate of Cleo's father, interested in buying some of his catch. Lewis gets a job as a lab assistant for Dr. Linda Denman, a beautiful marine biologist, and secretly plans to use her equipment to try to find out more about the girls' mermaid transformation. But he instead ends up putting their secret in danger, when he leaves a DNA sample from Cleo behind in the lab, and Dr. Denman discovers it. The girls realise that they are really in trouble when Cleo sneaks into Dr. Denman's lab, and discovers a scientific article on Dr. Denman's laptop about her unusual cell sample. With Lewis refusing to believe that Dr. Denman stole the cell sample from him (partly because he has a crush on her), Emma, Rikki and Cleo's secret could be about to be exposed to the world.

The day of Don and Sam's wedding arrives, and selfish Kim tries to ruin everything. Meanwhile, Lewis gets the chance to spend three years working at a scientific research centre in America, but frets about telling Cleo... until Kim tells her for him. Cleo is distraught, thinking that Lewis planned to leave without telling her, and refuses to talk to him. Don and Sam's big day is then completely ruined when Kim turns on the sprinklers (nearly making Cleo, Rikki and Bella grow tails in front of everyone). In the end, Lewis tells Cleo that he is not going to America because he loves her, and Cleo forgives him. But she decides to let him go after all, and they part promising to see each other again. The girls organise another wedding ceremony for Don and Sam on Mako Island, and Kim at last warms to Sam. Now that the mermaids have been identified, Dr. Denman continues her pursuit of them by holding Lewis hostage on her boat and using his mobile phone to lure the girls to the Moon Pool, where she traps them. After discovering that the three mermaids are in fact Rikki and her friends, Zane is left torn about where his loyalties lie; with his father, or with Rikki. Eventually, his conscience leads him to set Lewis and the girls free (much to his father and Dr. Denman's annoyance), but the mermaids are not out of trouble yet. Knowing that Dr. Denman and the scientists will still come after them, the girls must make a tough decision. Miss Chatham tells them of the forthcoming lunar eclipse, and says that, if they enter the Moon Pool when the eclipse passes over it, it will draw their powers away from them. As normal girls, the three of them would be of no interest to the scientists, and would be out of danger. The girls make the choice to enter the pool, and while their powers seem to vanish completely, the next morning they find they've become mermaids again: the eclipse only affected them for 12 hours.In some countries, such as Hungary, Romania and Bulgaria, the episodes "Three's Company", "Sea Change" and "Unfathomable" are combined into a 70-minute television movie. This version aired only in Central and Eastern Europe on Jetix. Emma and Cleo are suspicious of Rikki when they see her apparently out on a date with Zane. After her friends pester her about it, Rikki finally confesses that she and Zane are going out, and Emma and Cleo, fearing that Rikki will tell Zane their secret, tell her to dump him. Rikki refuses, and she and the others fall out; but when Zane's father unveils plans to turn Mako Island into a holiday resort, and Zane fails to stand up to him, Rikki begins to wonder whether she made the wrong choice. Rikki is bothered by Zane's reappearance on the Gold Coast, as she realises she still likes him. With Zane thinking that Rikki gave up her mermaid powers at the lunar eclipse during the war with Dr. Denman, can she manage to keep her secret from him for a second time? Meanwhile, Cleo grows jealous when she sees that Lewis and Charlotte are becoming close friends, and, in a mad rage, she steals Charlotte's diary... and discovers that she apparently already has a boyfriend named RJ. The episode ends with Zane rediscovering that Rikki is a mermaid, when Nate blasts her with water, but he promises not to tell anyone, and they rekindle their relationship. Cleo ends up embarrassing herself when she confronts Charlotte about her secret other boyfriend, and learns that the dates in the diary are meetings for Charlotte's theatre group (RJ stands for Romeo and Juliet). Will's ruthless sister, Sophie, is training him to be a professional free-diver, only he'd rather spend time swimming with Bella. Irritated, Sophie tells Bella to stay away from Will, as she sees her as a distraction for him, but Bella doesn't listen. While watching Will train in a public pool, Bella dives in to help him with his swimming technique... just as Sophie turns up. Although Will manages to hide her, Bella is still worried, not about Sophie, but about Will. She thinks he only likes the mermaid side of her. Meanwhile, Rikki comes up with a brilliant idea to hold corporate events at the cafe, but after Zane makes a mistake with the booking, the cafe is overrun by a wild children's party.

A full moon, in conjunction with a rare planetary alignment, calls the girls to the moon pool at Mako Island where their powers are greatly augmented and strengthened. The second series revolves around the arrival of a new girl, Charlotte Watsford ( Brittany Byrnes), who moves into the area and develops an instant attraction to Lewis. After Charlotte sees a film of her grandmother Gracie as a mermaid she meets Max Hamilton ( Martin Vaughan) who was once romantically involved with Gracie. Happy to have met his lover's granddaughter, he tells her about the previous mermaids—Louise, Julia, and Gracie—and of Mako Island. Charlotte travels to the moon pool during a full moon and becomes the fourth mermaid in possession of all the girls' powers. Believing herself superior, she and the girls become sworn enemies. This conflict results in a confrontation during an especially powerful full moon, which ends with Charlotte being permanently stripped of her mermaid form and abilities. With the school's end of year dance approaching, Emma takes up the stressful job of heading up the dance committee. But, while the tough task of organising the dance is bad enough on her nerves, she is also flattened by the news that Byron, who she was hoping would ask her to the dance, is already going with Ice Queen Miriam. Cleo is also disappointed that Lewis is too caught up in his experiments to ask her to the dance, and, rather than go alone, she is forced to ask Nate. The only upside is that Lewis, after days of research and testing, has come up with a formula to make the girls' skin waterproof, and they no longer have to worry about getting wet. But, as the wise Miss Chatham declares, science and magic cannot mix, and Lewis' formula gives the girls an allergic reaction where their skin turns red, and they are forced to flee the dance. Things turn out well in the end, however, as Cleo finally admits to Lewis how she feels about him, and they become a couple. With the arrival of the girls' one year anniversary as mermaids, Cleo organises a party at Mako Island to celebrate. But when Zane accidentally spills some drinks on Emma at the cafe, he is forced to have an argument with Ash to stop him from seeing her as a mermaid. Overhearing Zane calling her a 'clumsy waitress', Emma doesn't realise he is only trying to help her, and gives him the cold shoulder. This leads to Emma and Zane's girlfriend Rikki becoming enemies, and it looks like there will be no party at Mako Island, which upsets Cleo. Meanwhile, Lewis feels guilty when he realises he hasn't been spending much time with Charlotte. The strange old woman makes a reappearance at the marine park, and gives Cleo a mysterious warning not to look at the full moon. The other girls, however, are convinced the old woman is crazy, and ignore the warning, going ahead with Emma's planned surprise party for her father. At the party, however, Emma sees the reflection of the full moon in a bowl of punch, and then starts acting very strange, losing her inhibitions and being rude to the guests. Cleo, Rikki and Lewis try to keep her under control, but Emma ends up diving into the water, and turning into a mermaid. Worse still, when the others dry her off, her tail won't go away. How can they hide a mermaid in the middle of a party? Lewis is being troubled by recurring nightmares of Cleo being exposed as a mermaid, and it is clear that he still has feelings for her. Meanwhile, Elliot surprises everyone by asking Kim out on a date, and Lewis and Cleo act as chaperones when they go to the marine park. However, Lewis' nightmare comes true when Cleo falls into the water, and someone spots her. Elsewhere, Emma grows suspicious when she discovers that Rikki has been having secret meetings with Ash... but it turns out the two of them were only planning to give her an award.Also, they no longer are attracted to each other through magnetism. It is possible that they were enchanted to resist its magnetic pull for specific purposes. When Kim demands an expensive holiday, Cleo's father gets a second job doing a pirate show at the marine park, so that he can afford it. At first, Cleo is worried that her father will humiliate himself; but when the dolphin shows start emptying out, Cleo realises that her father is more popular than she thought, and his shows threaten to end Cleo's job. Meanwhile, there is trouble between Bella and Will, when they struggle to find things in common. As Bella grows more and more fond of Will, she tries to set up a study date so that they can spend some time together, but is hurt to find herself stood up. Furious, she goes to Will's boatshed to confront him, and is devastated to find him there with another girl. Meanwhile, Lewis' science teacher, Ms. Taylor, is impressed by Lewis' science project – not realising that it is actually his apparatus for studying the floating water from the Moon Pool. Lewis is then forced to show his experiment in class, putting the secret of the Moon Pool and the mermaids in danger. Ignoring Rikki's advice, Bella follows Will and the mystery girl on a diving trip, and they nearly see her, but Bella is relieved when she discovers that the girl is Will's sister, Sophie. Cleo uses her power to help Lewis replicate the effect of the floating Moon Pool water, and he submits an alternative science project, keeping the mermaids' secret safe. While dirt biking through a caravan park, Zane and Nate spot a rundown Harley-Davidson motorcycle, and Nate steals the badge. A guilty Zane, however, tries to return the badge, but is caught by the owner, who thinks he is the thief. Zane has an argument with the man, and insults him... not realising that he is girlfriend Rikki's father, and that the caravan park is where Rikki lives; but she has been too embarrassed to admit it. When Zane finds out, he tells Rikki that he doesn't care where she comes from or how much money she has, but her father doesn't approve of Zane, and keeps them apart. Meanwhile, Cleo begins to suspect that Charlotte and Lewis are secretly going out.

While Rikki enjoys her new life as a mermaid, Emma and Cleo are less enthusiastic about their mermaid powers. 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. Rikki soon gets fed up with their moaning, storms off and accidentally discovers a power of her own. Meanwhile, Cleo wants to tell her friend, Lewis, about her powers, but Emma and Rikki forbid it. 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. Lewis discovers that the girls are mermaids but promises to keep their secret. In the United States "Dr. Danger" and "A Twist in the Tail" premiered as a one-hour movie called "Exposed".

Site Customisation

Lewis tells the girls that Charlotte is a mermaid. Although they are unhappy that Charlotte has become the fourth mermaid of Mako Island, they decide to welcome her into their group and befriend her. The perfect opportunity comes when the four of them are placed on the school's beach volleyball team to stop them from failing gym class (as they have been avoiding swimming lessons). But, although the girls do form a bond, Emma, Rikki and Cleo still have reservations about Charlotte, when it is revealed that she possesses all three of their mermaid powers, and declares herself a "super mermaid". When Emma's mother makes her take her brother Elliot for riding lessons, she ends up getting into a competitive conflict with the riding instructor, Ash (who Rikki and Cleo are convinced she has a crush on). However, Emma's stubbornness towards Ash lands her in trouble, when she ignores a warning from him, and accidentally lets his horse, Rebel, eat some poisonous weeds. Meanwhile, Lewis wins an award for young inventors, and asks Cleo to accompany him to the awards ceremony, but she declines, saying that they are just friends now. Lewis instead decides to take Charlotte as his date, but then Cleo changes her mind, and accepts Lewis' invitation, not realising that Charlotte is going in her place.