The BEST episodes of H2O: Just Add Water season 2

Every episode of H2O: Just Add Water season 2, ranked from best to worst by thousands of votes from fans of the show. The best episodes of H2O: Just Add Water season 2!

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: 8/24/2024Network: Network 10Status: Ended
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Unfathomable
star
8.87
94 votes

#1 - Unfathomable

Season 2 - Episode 26 - Aired 3/21/2008

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?

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Three's Company
star
8.83
83 votes

#2 - Three's Company

Season 2 - Episode 24 - Aired 3/7/2008

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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Bubble, Bubble, Toil and Trouble
star
8.69
81 votes

#3 - Bubble, Bubble, Toil and Trouble

Season 2 - Episode 22 - Aired 2/22/2008

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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The Heat is On
star
8.45
83 votes

#4 - The Heat is On

Season 2 - Episode 18 - Aired 1/25/2008

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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Moonstruck
star
8.40
81 votes

#5 - Moonstruck

Season 2 - Episode 17 - Aired 1/18/2008

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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Sea Change
star
8.34
77 votes

#6 - Sea Change

Season 2 - Episode 25 - Aired 3/14/2008

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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Stormy Weather
star
8.28
106 votes

#7 - Stormy Weather

Season 2 - Episode 1 - Aired 9/28/2007

With Cleo's parents now divorced, Cleo is ordered by her dad to take more care of Kim, starting with taking her to a concert. But on the night, Cleo, Rikki and Emma all accidentally see the full moon, and take off to Mako Island, with Lewis in hot pursuit. Once there, the girls undergo another magical transformation in the Moon Pool, as a rare planetary alignment intensifies the power of the full moon – Emma's power is enhanced so that she can produce snow and frost, Rikki can conjure lightning, and Cleo can now control wind as well as water. After the moonstruck girls nearly harm Lewis, they realise that they must work to control their new powers, before anyone else gets hurt.

Directors: Jeffrey Walker
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Irresistable
star
8.22
88 votes

#8 - Irresistable

Season 2 - Episode 15 - Aired 1/4/2008

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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In Over Our Heads
star
8.08
60 votes

#9 - In Over Our Heads

Season 2 - Episode 11 - Aired 12/7/2007

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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Wrong Side of the Tracks
star
7.98
60 votes

#10 - Wrong Side of the Tracks

Season 2 - Episode 8 - Aired 11/16/2007

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.

Writer: Sam Carroll
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Fire and Ice
star
7.83
66 votes

#11 - Fire and Ice

Season 2 - Episode 4 - Aired 10/19/2007

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 recieving cards from a secret admirer

Directors: Jeffrey Walker
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In Hot Water
star
7.80
55 votes

#12 - In Hot Water

Season 2 - Episode 7 - Aired 11/9/2007

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

Writer: Joss King
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And Then There Were Four
star
7.72
83 votes

#13 - And Then There Were Four

Season 2 - Episode 21 - Aired 2/15/2008

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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Missed the Boat
star
7.68
57 votes

#14 - Missed the Boat

Season 2 - Episode 10 - Aired 11/30/2007

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.

Directors: Jeffrey Walker
Writer: Max Dann
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Pressure Cooker
star
7.66
65 votes

#15 - Pressure Cooker

Season 2 - Episode 6 - Aired 11/2/2007

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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Control
star
7.63
64 votes

#16 - Control

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

The girls have problems with their new powers and Cleo finds that Lewis isn't helping. A new girl called Charlotte arrives and develops a crush on a certain charecter

Directors: Jeffrey Walker
Writer: Max Dann
Watch Now:AmazonApple TV
Riding for a Fall
star
7.62
90 votes

#17 - Riding for a Fall

Season 2 - Episode 9 - Aired 11/23/2007

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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The Gracie Code (2)
star
7.59
79 votes

#18 - The Gracie Code (2)

Season 2 - Episode 20 - Aired 2/8/2008

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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The One That Got Away
star
7.59
96 votes

#19 - 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:AmazonApple TV
Hocus Pocus
star
7.56
89 votes

#20 - 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.

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Fish Fever
star
7.48
58 votes

#21 - 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.

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Reckless
star
7.44
82 votes

#22 - 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.

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Get Off My Tail
star
7.44
57 votes

#23 - 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
Writer: Sam Carroll
Watch Now:AmazonApple TV
The Gracie Code (1)
star
7.42
80 votes

#24 - 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?

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Moonwalker
star
7.39
62 votes

#25 - 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...

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