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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S01E01 Metamorphosis
July 7 · 24min find the promo
Show synopsis
Three very different teenage girls, Emma, Cleo and Rikki, facing everyday teenage problems. With a twist: they're mermaids; after discovering a magic place where they are given incredible powers over water that change their lives forever.
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S01E02 Pool Party
July 14 · 24min find the promo
Show synopsis
Miriam is having a pool party and Cleo considers going despite the risks of being around water. Meanwhile, Emma contemplates her future as a swimmer and Rikki makes a new discovery.
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S01E03 Catch of the Day
July 21 · 24min find the promo
Show synopsis
Rikki, Emma and Cleo discover that sea turtles are being captured by fishing nets. When Rikki and Emma attempt to rescue the turtles by cutting the nets, it causes the fisherman to think that there is a rogue shark roaming their ocean.
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S01E04 Party Girls
July 28 · 24min find the promo
Show synopsis
Emma decides that she is not going to have her annual sleepover party due to what has happened to them. But Rikki and Cleo try to convince her otherwise. Meanwhile, Lewis conducts experiments on the girls.
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S01E05 Something Fishy
August 4 · 24min find the promo
Show synopsis
Cleo's sister Kim finds her diary and thinks that Cleo and her friends are 'evil mermaids' and she plans to tell everyone. Meanwhile, Lewis goes to Mako Island to find out more about what happened to the girls.
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S01E06 Young Love
August 11 · 24min find the promo
Show synopsis
Emma gets into trouble babysitting her little brother Elliot. She goes to Lewis for help when Elliot develops a crush on Rikki.
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S01E07 Moon Spell
August 18 · 24min find the promo
Show synopsis
Miss Chatham gives Cleo a warning that she doesn't quite understand. Until Emma finds herself in a trance and unable to change back from a mermaid under a full moon.
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S01E08 The Denman Affair
August 25 · 24min find the promo
Show synopsis
Lewis is offered a great job with a marine biologist, but the girls are concerned that his interest will cause him to reveal too much information
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S01E09 Dangerous Waters
September 1 · 24min find the promo
Show synopsis
Rikki is offered a job to collect rare fish. At first it seems perfectly fine, until she finds out the person that hired her is selling the fish for large profits.
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S01E10 The Camera Never Lies
September 8 · 24min find the promo
Show synopsis
Rikki enters a short film contest on the theme of 'Heroes' and decides to capture some nice underwater footage with her 'abilities'. Meanwhile, Emma is interviewing her mum and Zane and Lewis are planning to rennact Dr. Bennet's windsurfing record.
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S01E11 Sink or Swim
September 15 · 24min find the promo
Show synopsis
Byron asks Emma for help with training the school's swimming team and Emma has some trouble deciding whether or not to help out in her current situation. Meanwhile, Lewis continues to experiment on the girls, which annoys Rikki.
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S01E12 The Siren Effect
September 22 · 24min find the promo
Show synopsis
The full moon gives Cleo a power to put guys in a 'trance' and she suddenly gets a rush of admirers.
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S01E13 Shipwrecked
September 29 · 24min find the promo
Show synopsis
Emma invites Miss Chatham to stay at her place and Zane overhears Miss Chatham's concerns about 'her treasure'.
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S01E14 Surprise!
October 6 · 24min find the promo
Show synopsis
Cleo's 16th birthday is approaching and she thinks that her father is going to throw another embarrasing birthday party. Meanwhile, Zane tries to find the 'sea monster' that he saw when he almost drowned.
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S01E15 The Big Chill
October 13 · 24min find the promo
Show synopsis
Emma is doing well at her new job at the JuiceNet cafe, but when she is left in charge, she has trouble managing her new employee, Rikki.
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S01E16 Lovesick
October 20 · 24min find the promo
Show synopsis
Rumour has it that Cleo has a boyfriend and her friends and family are trying to find out who he is. Meanwhile, Zane continues his search for the 'sea monster' he saw.
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S01E17 Under the Weather
October 27 · 24min find the promo
Show synopsis
The girls have to fake sick as a result of a thunderstorm, so their secret won't be discovered at school. But their 'sickness' attracts the attention of doctors.
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S01E18 Bad Moon Rising
November 3 · 24min find the promo
Show synopsis
Zane's quest to find the 'sea monster' has led him to Mako Island. Rikki loses control of her powers as a result of the full moon and Zane finds her.
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S01E19 Hurricane Angela
November 10 · 24min find the promo
Show synopsis
Cleo and Kim are stuck with their cousin Angela who wants to go body boarding and causes a bird brained distraction when Cleo refuses.
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S01E20 Hook, Line and Sinker
November 17 · 24min find the promo
Show synopsis
Lewis enters the annual fishing derby. When Cleo sees him struggling, she decides to help him out with disastorous consequnces. Meanwhile, Rikki and Zane are trapped on a hotel balcony.
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S01E21 Red Herring
November 24 · 24min find the promo
Show synopsis
Emma decides to change her look by colouring her hair red. Though nothing is that simple when you're half-mermaid. Zane asks Rikki out on a date.
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S01E22 Fish Out Of Water
December 1 · 24min find the promo
Show synopsis
Emma and Cleo are concerned about Rikki going out with Zane. They force Rikki to decide to either be with Zane or with them.
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S01E23 In Too Deep
December 8 · 24min find the promo
Show synopsis
Rikki finds a locket that looks the same as Miss Chatham's in a Jewellery shop and she is determined to get it.
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S01E24 Love Potion #9
December 15 · 24min find the promo
Show synopsis
With the school dance coming up, Emma and Cleo hope Byron and Lewis will ask them out. Meanwhile, Miss Chatham and Lewis argue about which has more merit – magic or science.
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S01E25 Dr. Danger
December 22 · 24min find the promo
Show synopsis
It's time for Emma's family's annual vacation trip, but she can't go as the risks are too high. But all her excuses don't go very well with her family. Meanwhile, with the return of Dr Denman, Zane is closer than ever to cracking the girl's secret.
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S01E26 A Twist in the Tail
December 29 · 24min find the promo
Show synopsis
Dr Denman sets up a trap for the girls at Mako Island and Zane is forced to decide who he should be helping.