H2O: Just Add Water revolves around three teenage girls facing everyday teen problems with an added twist: they cope with the burden of growing a giant fin and transforming into mermaids whenever they come in contact with water.
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Netflix
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see all options Availability data: JustWatch
- Seasons
- 3
- Episodes aired
- 78
- Latest aired
- S03E25
- Total runtime
- 1d 7h
Timeline when each season aired
- Season 1 July 2006 – December 2006 26 episodes
- Season 2 September 2007 – March 2008 26 episodes
- the show was away for 1 year and 7 months
- Season 3 October 2009 – April 2010 26 episodes
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S02E01 Stormy Weather
September 28 · 24min find the promo
Show synopsis
The girls catch a glimpse of the full moon and Lewis tries to keep them grounded. Drawn back to Mako Island during a rare planetary alignment, they experience unpredictable shifts in their abilities. Cleo navigates some difficult new family dynamics at home.
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S02E02 Control
October 5 · 24min find the promo
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The girls have problems with their new powers and Cleo finds that Lewis isn't helping. A new girl called Charlotte arrives and hits it off with a certain someone.
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S02E03 The One That Got Away
October 12 · 24min find the promo
Show synopsis
Rikki tries to avoid Zane when he comes back, but needs his help after an incident with a speedboat. Meanwhile, Charlotte continues to flirt with Lewis and Cleo worries for their secret.
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S02E04 Fire and Ice
October 19 · 24min find the promo
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Trouble arises when Emma throws a party to prove she is as fun as Rikki. Meanwhile, Lewis is trying to prove his manhood and Cleo is receiving cards from a secret admirer.
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S02E05 Hocus Pocus
October 26 · 24min find the promo
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Trouble is in the air as the Setori's start to suffer and the JuiceNet is endangered by a new bar. But when Lewis finds a book of mermaid spells, the girls attempt to use a potion to fix everything. However, things aren't so easy when you have special powers.
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S02E06 Pressure Cooker
November 2 · 24min find the promo
Show synopsis
Cleo is worried when she sees her dad around with another woman. When she arrives at their house, she turns out to be Charlotte's mother! Meanwhile, Rikki and Emma attempt to save the Sertori's dinner with their powers.
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S02E07 In Hot Water
November 9 · 24min find the promo
Show synopsis
Everyone is shocked when Cleo is fired at the Ice Cream Stand, and even more so when Lewis takes her place! Rikki and Emma strike back at him but end up going too far
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S02E08 Wrong Side of the Tracks
November 16 · 24min find the promo
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Zane is curious by Rikki's reluctancy to reveal where she lives. So one day, he eventually convinces her to reveal her home: a trailer park with her grouchy father.
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S02E09 Riding for a Fall
November 23 · 24min find the promo
Show synopsis
Emma has to take Eliot for horse riding lessons and the competitive perfectionist tries to be better than the instructor. Meanwhile, Lewis double dates with Charlotte and Cleo.
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S02E10 Missed the Boat
November 30 · 24min find the promo
Show synopsis
Cleo starts to struggle at school and gets help from the new tutor. But there are bigger problems when Charlotte starts to get closer to Mako Island with the help of Lewis.
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S02E11 In Over Our Heads
December 7 · 24min find the promo
Show synopsis
In need of cash, Rikki decides to go and searching for a lost statue with a huge reward. But she lies to Emma and Cleo, which causes danger when Rikki is knocked out!
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S02E12 Fish Fever
December 14 · 24min find the promo
Show synopsis
Emma gets poisioned after cutting her finger on some coral and she begins to turn into a white scaled monster! Meanwhile Charlotte thinks Cleo is trying to break her and Lewis apart.
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S02E13 Moonwalker
December 21 · 24min find the promo
Show synopsis
On the night of a full moon, Lewis, Emma, Rikki and Charlotte accompany Cleo's family for a camping trip at Mako. When all three girls are affected by the moon, they are unable to stop the curious Charlotte...
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S02E14 Get Off My Tail
December 28 · 24min find the promo
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Cleo decides to restart her friendship with Lewis and embrace her abilities, while Emma is shocked with the new supervisor who has big changes planned.
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S02E15 Irresistable
January 4 · 24min find the promo
Show synopsis
Zane learns of the myth of Ambergris, a fragrance that can make mermaids fall for any man that wears it. When he buys it, Nate ends up wearing it and Emma, Cleo and Rikki all fall for him!
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S02E16 Double Trouble
January 11 · 24min find the promo
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Lewis is puzzled when he dreams about Cleo being photographed by people. Later, he and Cleo take Eliot and Kim to the marine park. Meanwhile, Emma thinks something is up between Ash and Rikki.
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S02E17 Moonstruck
January 18 · 24min find the promo
Show synopsis
It's full moon and the girls insist that they don't need Lewis to assit his help as all three girls are staying at Emma's and Ash is coming over. When Cleo and Rikki fall under the moon spell, can Lewis stop them from revealing their secret to Ash?
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S02E18 The Heat Is On
January 25 · 24min find the promo
Show synopsis
For the first anniversary of the girls being mermaids, Cleo decides to throw a party. However, Emma and Rikki fall out following a fight between Ash and Zane and Cleo may have to celebrate alone.
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S02E19 The Gracie Code (1)
February 1 · 24min find the promo
Show synopsis
Lewis is trying to find more information on the moon pool and stumbles across research on it by Max Hamilton from fifty years ago. Will Lewis reveal the girls secret to him in order to complete the puzzle?
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S02E20 The Gracie Code (2)
February 8 · 24min find the promo
Show synopsis
Charlotte demands answers to why Lewis is hanging out with the girls so much. She starts to believe an excuse from Cleo, but then a discovery from inside Max's research brings her to the secret! Meanwhile, Ash decides to help Emma with her "fear of water"
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S02E21 And Then There Were Four
February 15 · 24min find the promo
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Charlotte's stubborn nature and thirst for knowledge leads her to Max, who confirms her suspicions and leads her to the Moon Pool. Lewis meanwhile is having trouble trying to keep their relationship together.
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S02E22 Bubble Bubble, Toil and Trouble
February 22 · 24min find the promo
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The girls decide that they should accept Charlotte, and the four work together when they need to join the volleyball team to avoid failing Physical Education.
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S02E23 Reckless
February 29 · 24min find the promo
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Charlotte is determined to prove her love for Lewis and show she is better than the other three, and refuses their advice and takes matters into er own hands when Nate causes trouble for Lewis.
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S02E24 Three's Company
March 7 · 24min find the promo
Show synopsis
More friction arises, this time over Lewis' birthday party. Charlotte takes control and drives Rikki away from the party. However, things go out of hand and it is up to her to save the day.
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S02E25 Sea Change
March 14 · 24min find the promo
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Angry over the short friendship with the girls, Charlotte forces Lewis to choose between her and his friends. This results in Cleo to feel isolated and she runs away and gets lost. When he is informed, Lewis must make up his mind: Cleo or Charlotte?
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S02E26 Unfathomable
March 21 · 24min find the promo
Show synopsis
A unusual and rare planetary alingment is set to cause the full moon to remove a mermaids powers if they enter the moon pool! Charlotte shows immunity and tries to reveal the girls secret before Lewis takes her to Mako Island. The girls follow and a battle erupts. But who will win?