List of H2O: Just Add Water episodes

H2O: Just Add Water

Company type	Television series
Industry	Entertainment
Founded	July 7, 2006 (2006-07-07)
Headquarters	Australia
Area served	Worldwide
Products	Television drama series

The following section provides a comprehensive episode guide for the Australian television series H₂O: Just Add Water. Originally broadcast on Network Ten in Australia, the show has reached audiences in more than 120 countries worldwide. The first season debuted on 7 July 2006, followed by the second season premiering on 28 September 2007. The third season was initially released in the United Kingdom on 26 October 2009 and later aired in Australia on 22 May 2010.

Series overview

Season		Number of episodes	Original broadcast dates
			Premiere date	Finale date
	1	26	7 July 2006 (2006-07-07)	29 December 2006 (2006-12-29)
	2	26	28 September 2007 (2007-09-28)	21 March 2008 (2008-03-21)
	3	26	26 October 2009 (2009-10-26) (UK)	16 April 2010 (2010-04-16) (UK)

Series 1 (2006)

The narrative follows three teenagers—Emma Gilbert (Claire Holt), Cleo Sertori (Phoebe Tonkin), and Rikki Chadwick (Cariba Heine)—who find themselves stranded on Mako Island. Upon discovering a subterranean pool linked to the ocean, they undergo a transformation into mermaids, each acquiring distinct aquatic abilities: Emma can freeze water, Cleo manipulates its form and quantity, while Rikki has the power to heat it. They recruit Cleo’s friend Lewis McCartney (Angus McLaren) to assist them in uncovering the origin of their transformation and safeguarding their secret. The show combines elements of teenage drama with supernatural themes.

Significant plotlines include their encounter with Louise Chatham (Christine Amor), a former mermaid who cautions them about forthcoming threats. Zane Bennett (Burgess Abernethy) becomes fixated on unveiling the "sea monster," creating tension alongside marine biologist Dr. Denman (Lara Cox). The girls face capture but cleverly outwit their captors by temporarily surrendering their powers during a lunar eclipse.

Template:Episode listTemplate:Episode list {{Episode list ... [Subsequent episodes continue with succinct descriptions highlighting essential character progressions and major story arcs.] ... }} {{Episode list ... [Final episode] ... }}

No.	Ep.	Title	Director	Writer	Original air date	Production code

Series 2 (2007–08)

During an uncommon planetary alignment coinciding with a full moon, the girls' abilities are significantly enhanced at the moon pool on Mako Island. This season introduces Charlotte Watsford (portrayed by Brittany Byrnes), who relocates to the area and soon becomes entangled with Lewis. Upon learning that her grandmother Gracie was once a mermaid, Charlotte encounters Max Hamilton (played by Martin Vaughan), who discloses the legacy of earlier mermaids and the island's mystical history. Charlotte transforms into the fourth mermaid, inheriting all their powers; however, her pride leads her to become an antagonist. The season concludes with a climactic showdown in which Charlotte permanently loses her mermaid abilities.

Romantic storylines play a pivotal role this season: Cleo ends her relationship with Lewis due to his possessiveness; Lewis dates Charlotte but eventually reconciles with Cleo. Meanwhile, Rikki and Zane reignite their romance, and Emma reveals her mermaid secret to Ash (Craig Horner), creating tension because of the need for secrecy.

Template:Episode listTemplate:Episode listTemplate:Episode listTemplate:Episode listTemplate:Episode listTemplate:Episode listTemplate:Episode listTemplate:Episode listTemplate:Episode list ... {{Episode list ... The final episodes emphasize Charlotte’s increasing powers and rivalry against the original mermaids, culminating in her permanent loss of abilities following a power struggle during another rare full moon event. The season ends with revelations about past mermaids and strengthened relationships among the main characters. Note: Last appearances of Claire Holt, Brittany Byrnes, and Craig Horner

No.	No. in series	Title	Directed by	Written by	Original air date

Series 3 (2009–10)

The third installment begins with Cleo and Rikki adjusting to Emma's absence during her family trip. New additions to the cast include Bella Hartley (Indiana Evans), a mermaid and singer who possesses the unique ability to transform water into gelatine, and Will Benjamin (Luke Mitchell), an adept free diver investigating the mysteries surrounding Mako Island. Will accidentally triggers a phenomenon that causes water to become hostile toward mermaids. Concurrently, after Rikki ends their relationship, Zane attempts to capitalize on the Moon Pool's power.

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No. overall	No. in series	Title	Directed by	Written by	Original air date	Production code
Title = Happy Families	OriginalAirDate = 3 November 2009 (2009-11-03) (UK)	EpisodeNumber = 59	EpisodeNumber2 =7	ProdCode = 307	DirectedBy = Jeffrey Walker	WrittenBy = Max Dann	ShortSummary = Don introduces his new partner Sam to his daughters; Kim initially resists but leverages the situation for gifts. Bella applies for a position at the cafe but faces competition from Sophie, Will’s ambitious sister, creating internal conflict. Absent: Angus McLaren as Lewis McCartney

{{Episode list ... (Continue summarizing episodes focusing on business-related storylines such as character interactions influencing cafe operations, discovery of valuable resources like magnetic crystals, challenges affecting profitability and management shifts, strategic partnerships among characters, and significant developments involving new abilities or technologies impacting operational or market conditions.) ... }}

{{Episode list ... The concluding episodes emphasize increasing threats from mining magnetic crystals that damage the Moon Pool’s energy—essential for preventing a comet collision—a critical crisis demanding joint magical efforts from protagonists—culminating in graduation and restored team cohesion with Lewis’s return.

Guest starring: Angus McLaren as Lewis McCartney }} |}

Compilation TV films

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Title	First broadcast date

External links

• Episode guide on the Internet Movie Database