H2O: Just Add Water

Season 1

TV-PG

78%

Three ordinary teenage girls discover a moon pool on Mako Island that turns them into extraordinary mermaids with special powers over water on the night of a full moon. They must never look in the moon's eye or there will be side effects for each of them.

Where to Watch Season 1

26 Episodes

Metamorphosis
E1
Episode 1MetamorphosisThree 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.
Pool Party
E2
Episode 2Pool PartyAnnoying Miss Popularity, Miriam, is having a pool party and the girls want to go. But being around water is risky, especially when Zane tosses Cleo into the pool. Lewis is the only one around to help so he finds out their secret.
Catch of the Day
E3
Episode 3Catch of the DayRikki, 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.
Party Girls
E4
Episode 4Party GirlsEmma 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.
Something Fishy
E5
Episode 5Something FishyCleo'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.
Young Love
E6
Episode 6Young LoveEmma gets into trouble babysitting her little brother Elliot. She goes to Lewis for help when Elliot develops a crush on Rikki.
Moon Spell
E7
Episode 7Moon SpellMiss 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.
The Denman Affair
E8
Episode 8The Denman AffairLewis 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
Dangerous Waters
E9
Episode 9Dangerous WatersRikki lands a seemingly harmless job collecting rare fish, but when she learns the man who hired her doesn't work for the marine park but is actually a dealer selling the fish for big profits, she decides to take on the task of setting things right.
The Camera Never Lies
E10
Episode 10The Camera Never LiesRikki 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.
Sink or Swim
E11
Episode 11Sink or SwimByron 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.
The Siren Effect
E12
Episode 12The Siren EffectThe full moon gives Cleo a power to put guys in a 'trance' and she suddenly gets a rush of admirers.
Shipwrecked
E13
Episode 13ShipwreckedWhen Zane's complaint results in the enigmatic Miss Chatham being evicted from her boat at the marina, Emma invites her to stay with her family. After overhearing Miss Chatham and her concern for her "treasure", Zane pursues her boat when she departs the marina. Emma and Lewis catch up with them in time to help with a medical emergency but when Zane gets trapped on the sinking boat, Emma must risk the water to save him.
Surprise!
E14
Episode 14Surprise!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.
The Big Chill
E15
Episode 15The Big ChillWhen Emma is left in charge of the Juicenet café, Miriam is determined to make things go wrong. When she turns off the cooling system in the cold room, Emma tries to fix it by freezing everything in the room, including Miriam hiding inside!
Lovesick
E16
Episode 16LovesickRumour 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.
Under the Weather
E17
Episode 17Under the WeatherRather than risk exposure by getting wet in a rainstorm, Emma, Cleo and Rikki decide to play sick to avoid having to go to school. However, they overdo it and when the Dr is called to check in on the girls, she becomes alarmed and alerts the CDC that there may be a dangerous contagion.
Bad Moon Rising
E18
Episode 18Bad Moon RisingZane'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.
Hurricane Angela
E19
Episode 19Hurricane AngelaAngela, who is Cleo and Kim's cousin, comes to town for a visit. She acts very grown up and sweet but when Cleo takes her to the amusement park with her sister, she disappears. Cleo and Kim search for her but all Cleo finds is a rather large bird in the bathtub at home. When Cleo tries to return the bird, she is caught and it is assumed she was stealing the bird instead.
Hook, Line and Sinker
E20
Episode 20Hook, Line and SinkerLewis 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.
Red Herring
E21
Episode 21Red HerringWhen Byron tells Emma she's dependable with the same look & vibe, she feels predictable and decides to change her look by dying her hair. Zane thinks Miss Chatham holds the key to identifying the "sea monster" he saw when he almost drowned.
Fish Out Of Water
E22
Episode 22Fish Out Of WaterRikki and Zane begin secretly dating but Cleo and Emma catch them together at the movies. Cleo and Emma demand that she stop seeing Zane, forcing her to choose between him and them. Rikki refuses saying that true friends would never make her choose.
In Too Deep
E23
Episode 23In Too DeepRikki and Zane see a locket in a shop window that looks just like the one Cleo found by Mako Island. Miss Chatham tells the girls how her and her friends, Julia and Gracie, were mermaids when they were 15. Miriam buys the locket to spite Rikki.
Love Potion #9
E24
Episode 24Love Potion #9With the school dance coming up, Emma and Cleo hope Byron and Lewis will ask them out. Meanwhile, Miss Chatham and Lewis are arguing about which is more important, magic and science.
Dr. Danger
E25
Episode 25Dr. DangerIt'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.
A Twist in the Tail
E26
Episode 26A Twist in the TailWhile Dr. Denman holds Lewis prisoner on her boat, she and Harrison trap the girls in the Moon Pool. Zane must choose between his father and helping the girls. Their only chance to avoid exposure is to give up their powers. Will they do it?