H2O: Just Add Water

The WORST episodes of H2O: Just Add Water

Every episode ever - ranked by fan votes!

Season One: The lifes of three girls living on the Australian Gold Coast are changed forever. When Cleo, Emma and Rikki stumble upon a pool inside the dreaded Mako Island, a full moon transforms them and the next day they start turning into super powered mermaids! With the help of friend Lewis, the girls manage to control their powers and hide their secrets. But it becomes difficult with maddening full moons, nosey scientists and local bad boy Zane going on a quest to find them! Season Two: Following the incident with Dr Denman and the Lunar Eclipse, Emma, Cleo and Rikki want to go back to their normal lives. But when the full moon comes back, all three girls have a dramatic power change! Without Lewis, they could destroy themselves. But their friend is trying his best to help them, despite his relationship with geeky Charlotte. But Charlotte proves to be more of a threat when she learns about her grandmother being a mermaid and stumbles into the moon pool and becomes a mermaid herself!

Last Updated: 3/24/2022Network: Network Ten
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Valentine's Day
star
6.08
78 votes

#1 - Valentine's Day

Season 3 - Episode 4 - Aired 10/29/2009

Cleo has to put off Lewis' romance plans in order to help Kim with her crazy love life. Meanwhile, Don meets up with a National Parks Manager, Samantha, and the two decide to date.

Directors: Jeffrey Walker
Watch Now:AmazoniTunes
Jungle Hunt
star
7.09
86 votes

#2 - Jungle Hunt

Season 3 - Episode 2 - Aired 10/27/2009

With Will finding out about Mako Island, Bella tries to misdirect his search so that he will not discover the Moon Pool. However, Lewis and the girls find out that the Moon Pool is different.

Directors: Jeffrey Walker
Watch Now:AmazoniTunes
Big Ideas
star
7.21
75 votes

#3 - Big Ideas

Season 3 - Episode 5 - Aired 10/30/2009

To get more interest in the cafe, Zane develops a dirt bike race. However, Rikki finds out that it is a scam. She and Bella decide to team up to teach him a lesson. Meanwhile, Lewis and Cleo find out something interesting about mixing the waters in the Moon Pool

Directors: Jeffrey Walker
Watch Now:AmazoniTunes
Surprise!
star
7.30
99 votes

#4 - Surprise!

Season 1 - Episode 14 - Aired 10/6/2006

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.

Directors: Jeffrey Walker
Watch Now:AmazoniTunes
Power Play
star
7.31
104 votes

#5 - Power Play

Season 3 - Episode 15 - Aired 2/23/2010

Sophie uses Bella's idea for a fundraising concert and presents it as her own to Rikki to gain publicity for the cafe. Cleo's caught in the crossfire with Kim when Samantha moves in and puts her stamp on the Sertori home.

Directors: Colin Budds
Watch Now:AmazoniTunes
Keep Your Enemies Close
star
7.36
75 votes

#6 - Keep Your Enemies Close

Season 3 - Episode 3 - Aired 10/28/2009

At the marine park, Cleo seeks a job as a dolphin trainer. Meanwhile, until she and Bella reach an understanding, Rikki fires Nate's band, preventing them from playing in the cafe.

Directors: Jeffrey Walker
Watch Now:AmazoniTunes
Double Trouble
star
7.37
76 votes

#7 - Double Trouble

Season 2 - Episode 16 - Aired 1/11/2008

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.

Watch Now:AmazoniTunes
Moonwalker
star
7.40
53 votes

#8 - Moonwalker

Season 2 - Episode 13 - Aired 12/21/2007

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...

Watch Now:AmazoniTunes
The Awakening
star
7.45
130 votes

#9 - The Awakening

Season 3 - Episode 1 - Aired 10/26/2009

Cleo and Rikki enter their final year of high school. They make friends with a new girl, Bella, and a new boy, Will. However, they encounter a new force on Mako Island that has the power to turn water against the girls.

Directors: Jeffrey Walker
Watch Now:AmazoniTunes
Lovesick
star
7.48
64 votes

#10 - Lovesick

Season 1 - Episode 16 - Aired 10/20/2006

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.

Directors: Jeffrey Walker
Watch Now:AmazoniTunes
Reckless
star
7.51
74 votes

#11 - Reckless

Season 2 - Episode 23 - Aired 2/29/2008

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 her own hands when Nate causes trouble for Lewis.

Watch Now:AmazoniTunes
Hurricane Angela
star
7.52
62 votes

#12 - Hurricane Angela

Season 1 - Episode 19 - Aired 11/10/2006

Cleo and Kim are stuck with their cousin Angela who wants to go body boarding and causes a bird brained distraction when Cleo refuses.

Directors: Jeffrey Walker
Watch Now:AmazoniTunes
The Gracie Code (1)
star
7.55
71 votes

#13 - The Gracie Code (1)

Season 2 - Episode 19 - Aired 2/1/2008

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?

Watch Now:AmazoniTunes
Fish Fever
star
7.58
55 votes

#14 - Fish Fever

Season 2 - Episode 12 - Aired 12/14/2007

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.

Watch Now:AmazoniTunes
Hocus Pocus
star
7.58
89 votes

#15 - Hocus Pocus

Season 2 - Episode 5 - Aired 10/26/2007

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.

Watch Now:AmazoniTunes
Dangerous Waters
star
7.60
73 votes

#16 - Dangerous Waters

Season 1 - Episode 9 - Aired 9/1/2006

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.

Directors: Colin Budds
Watch Now:AmazoniTunes
The Camera Never Lies
star
7.60
73 votes

#17 - The Camera Never Lies

Season 1 - Episode 10 - Aired 9/8/2006

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.

Directors: Colin Budds
Watch Now:AmazoniTunes
Get Off My Tail
star
7.61
49 votes

#18 - Get Off My Tail

Season 2 - Episode 14 - Aired 12/28/2007

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.

Directors: Colin Budds
Watch Now:AmazoniTunes
Shipwrecked
star
7.65
69 votes

#19 - Shipwrecked

Season 1 - Episode 13 - Aired 9/28/2006

Emma invites Miss Chathams to stay at her place and Zane overhears Miss Chathams concerning about 'her treasure'.

Directors: Colin Budds
Watch Now:AmazoniTunes
Moon Spell
star
7.66
96 votes

#20 - Moon Spell

Season 1 - Episode 7 - Aired 8/18/2006

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.

Directors: Colin Budds
Watch Now:AmazoniTunes
Pool Party
star
7.66
205 votes

#21 - Pool Party

Season 1 - Episode 2 - Aired 7/14/2006

Annoying 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.

Directors: Colin Budds
Watch Now:AmazoniTunes
The One That Got Away
star
7.66
89 votes

#22 - The One That Got Away

Season 2 - Episode 3 - Aired 10/12/2007

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.

Directors: Jeffrey Walker
Watch Now:AmazoniTunes
The Siren Effect
star
7.67
70 votes

#23 - The Siren Effect

Season 1 - Episode 12 - Aired 9/22/2006

The full moon gives Cleo a power to put guys in a 'trance' and she suddenly gets a rush of admirers.

Directors: Colin Budds
Watch Now:AmazoniTunes
The Big Chill
star
7.68
59 votes

#24 - The Big Chill

Season 1 - Episode 15 - Aired 10/13/2006

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.

Directors: Jeffrey Walker
Watch Now:AmazoniTunes
The Jewel Thief
star
7.68
131 votes

#25 - The Jewel Thief

Season 3 - Episode 21 - Aired 4/14/2010

The girls discover the Mako crystals contain immense energy and need to mount a rescue mission when Zane jealously steals one in an effort to gain Rikki‟s attention.

Directors: Colin Budds
Watch Now:AmazoniTunes