Trent Sullivan

H2O: Just Add Water, also known as H2O, is an Australian fantasy children and teen drama TV show created by Jonathan M. Shiff. It first screened on Australia's Network Ten and as of 2009 ran in syndication in over 120 countries with a worldwide audience of more than 250 million. It was filmed on location at Sea World and other locations on the Gold Coast, Queensland, Australia. The show revolves around three teenage girls facing everyday teen problems with an added twist: they become mermaids with unique, supernatural powers over water.

Only two series with a total of 52 episodes were originally planned, but due to popular demand, a third series was filmed. Series one premiered in July 2006, followed by series two in September 2007. Series three first aired in the United Kingdom in October 2009, with the Australian premiere occurring in May 2010.

Rikki Chadwick, Emma Gilbert, and Cleo Sertori are three teenage Australian girls who find themselves stranded on the mysterious Mako Island, where they end up in a pool under a dormant volcano just as a full moon passes above them, bathing the pool in light. The girls are rescued and brought back to shore, only to discover something strange. Ten seconds after coming into contact with water, the girls transform into mermaids. After further experimentation, the girls also discover they have supernatural powers over water. The trio enlist the help of Cleo's friend Lewis McCartney to help them keep their secret and find out more about it.

Everyday situations, such as bathing and dealing with rainy weather, become tricky as the girls struggle with their newfound abilities, which come with many advantages and disadvantages, while also trying to keep them a secret from everyone else, including their families. They soon adapt to their new abilities and lifestyles.

Series two introduces Charlotte Watsford, a rival to Cleo, who dates Lewis shortly after Cleo had broken up with him. She gains mermaid powers and becomes the main antagonist of series two. She has all three of the mermaids' powers. In the end, Charlotte loses both her powers and Lewis, who gets back together with Cleo.

Series three sees the departure of Emma, who has left to travel the world with her parents and brother. A new character, Bella Hartley, is introduced and it is discovered that she has been a mermaid since the age of nine. Rikki and Cleo become friends with Bella, but are soon beset by a mysterious tentacle of water with a connection to Mako Island. A new boy, Will Benjamin, also arrives and becomes friends with the trio when he discovers that they are mermaids. The girls learn that Earth is in the path of a comet that could destroy the planet. They try to think of a plan to stop the catastrophe.

There are three different types of mermaid tails used on the show: custom-fitted tails that the girls swim in, a "floppy tail" used for stationary shots, and a "hard tail" for stunts. The custom costumes took six months to build, with the tails and tops made from body casts and comprising individually hand-crafted scales. The finished product weighs between 12 and 15 kilograms (26 and 33 lb), and 40 kilograms (88 lb) when wet. Inside the tail are leg straps where the girls are strapped up and then zipped up. Once in costume, the girls have to be lifted into the water. Attempts were made to minimise the on-screen visibility of the zips on the tails, such as adding extra scales and crafting a ridge of material around the length of the zip. The tail fin itself was designed with a foot pedal to assist the actresses with swimming. This, along with the fin, adds some 60 centimetres (2 ft) to the length of the costume.

All series have been released on DVD in Region 4 PAL format. Series one comprises six individual DVD sets released between September 2007 and November 2008, and a complete series set released in June 2009. Series two comprises three individual sets released between February and September 2009, and a complete series set released in November 2009. Series three comprises two individual sets released in July and September 2012, with a complete series released in December 2012.

A three-disc set, H2O: Season 1, Volume 1, containing the first 13 episodes of series 1 for Region 1 NTSC format was released on 16 June 2009 by Nickelodeon and Paramount Home Entertainment as a manufacture-on-demand (MOD) DVD-R release via Amazon.com through their CreateSpace service. No follow-up DVD volume releases were made from this initial set, which was later discontinued. A complete series DVD boxed set was released in Region 1 NTSC format on 6 November 2012 from New Video, and all three series were made available for purchase individually beginning on 5 March 2013.

An official soundtrack for series two of the show, titled H2O: Just Add Water and recorded by singer Kate Alexa, was first released on 10 September 2007 in Australia on Liberation Records. It has since been made available worldwide. Its lead track, "No Ordinary Girl", is the theme song for the show. "No Ordinary Girl" is performed by Ellie Henderson in series one, by Kate Alexa in series two and by Indiana Evans in series three.

A second soundtrack, featuring music from series three, was first released on iTunes on 17 February 2011,[10] and later worldwide in March 2011. It is also titled H2O: Just Add Water, and most tracks on the album were recorded by actress Indiana Evans.[11]

Several children's books have been released by Nickelodeon UK:[12]

In July 2011, the production of a 26-episode spinoff was announced,[21] which became Mako: Island of Secrets. The show follows the adventures of 15-year-old Zac and mermaids Sirena, Nixie, and Lyla.[22] In the final series of the show, Cariba Heine makes a guest appearance as Rikki.

In May 2015, an animated spinoff targeted to children premiered on Netflix, titled H2O: Mermaid Adventures.[23][24]

Since its initial airing, H2O: Just Add Water has experienced a resurgence of interest and popularity. This is largely due to the show becoming widely available on streaming platforms like Netflix and Amazon Prime Video.

Social media has also played a big part in bringing fans together. Platforms like TikTok, Instagram, and Reddit have allowed viewers to share fan edits, and fan videos which have flourished within the H2O: Just Add Water fandom and further expanded its modern popularity.