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The Best Episodes of H2O: Just Add Water Season 2

Every episode of H2O: Just Add Water Season 2 ranked from best to worst. Discover the Best Episodes of H2O: Just Add Water Season 2!

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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

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Episode Rankings

  1. #1 Fan Favorite
    H2O: Just Add Water Season 2 Episode 26 - Unfathomable
    8.6/10(257 votes)

    S2:E26

    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?

    Director:Unknown
    Writer:Unknown

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  2. H2O: Just Add Water Season 2 Episode 8 - Wrong Side of the Tracks
    8.5/10(238 votes)

    S2:E8

    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.

    Director:Unknown
    Writer:Unknown

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  3. H2O: Just Add Water Season 2 Episode 25 - Sea Change
    8.5/10(227 votes)

    S2:E25

    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?

    Director:Unknown
    Writer:Unknown

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  4. H2O: Just Add Water Season 2 Episode 11 - In Over Our Heads
    8.3/10(241 votes)

    S2:E11

    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!

    Director:Unknown
    Writer:Unknown

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  5. H2O: Just Add Water Season 2 Episode 19 - The Gracie Code (1)
    8.3/10(208 votes)

    S2:E19

    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?

    Director:Unknown
    Writer:Unknown

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  6. H2O: Just Add Water Season 2 Episode 17 - Moonstruck
    8.1/10(203 votes)

    S2:E17

    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?

    Director:Unknown
    Writer:Unknown

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  7. H2O: Just Add Water Season 2 Episode 24 - Three's Company
    8.1/10(193 votes)

    S2:E24

    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.

    Director:Unknown
    Writer:Unknown

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  8. H2O: Just Add Water Season 2 Episode 13 - Moonwalker
    7.9/10(196 votes)

    S2:E13

    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...

    Director:Unknown
    Writer:Unknown

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  9. H2O: Just Add Water Season 2 Episode 20 - The Gracie Code (2)
    7.9/10(193 votes)

    S2:E20

    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"

    Director:Unknown
    Writer:Unknown

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  10. H2O: Just Add Water Season 2 Episode 16 - Double Trouble
    7.8/10(204 votes)

    S2:E16

    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.

    Director:Unknown
    Writer:Unknown

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  11. H2O: Just Add Water Season 2 Episode 21 - And Then There Were Four
    7.8/10(189 votes)

    S2:E21

    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.

    Director:Unknown
    Writer:Unknown

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  12. H2O: Just Add Water Season 2 Episode 5 - Hocus Pocus
    7.7/10(209 votes)

    S2:E5

    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.

    Director:Unknown
    Writer:Unknown

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  13. H2O: Just Add Water Season 2 Episode 12 - Fish Fever
    7.7/10(194 votes)

    S2:E12

    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.

    Director:Unknown
    Writer:Unknown

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  14. H2O: Just Add Water Season 2 Episode 15 - Irresistable
    7.7/10(199 votes)

    S2:E15

    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!

    Director:Unknown
    Writer:Unknown

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  15. H2O: Just Add Water Season 2 Episode 18 - The Heat Is On
    7.7/10(190 votes)

    S2:E18

    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.

    Director:Unknown
    Writer:Unknown

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  16. H2O: Just Add Water Season 2 Episode 3 - The One That Got Away
    7.6/10(213 votes)

    S2:E3

    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.

    Director:Jeffrey Walker
    Writer:Unknown

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  17. H2O: Just Add Water Season 2 Episode 1 - Stormy Weather
    7.5/10(210 votes)

    S2:E1

    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.

    Director:Jeffrey Walker
    Writer:Unknown

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  18. H2O: Just Add Water Season 2 Episode 4 - Fire and Ice
    7.5/10(207 votes)

    S2:E4

    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.

    Director:Jeffrey Walker
    Writer:Unknown

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  19. H2O: Just Add Water Season 2 Episode 10 - Missed the Boat
    7.5/10(190 votes)

    S2:E10

    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.

    Director:Jeffrey Walker
    Writer:Unknown

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  20. H2O: Just Add Water Season 2 Episode 23 - Reckless
    7.5/10(183 votes)

    S2:E23

    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.

    Director:Unknown
    Writer:Unknown

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  21. H2O: Just Add Water Season 2 Episode 2 - Control
    7.4/10(220 votes)

    S2:E2

    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.

    Director:Jeffrey Walker
    Writer:Unknown

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  22. H2O: Just Add Water Season 2 Episode 6 - Pressure Cooker
    7.4/10(203 votes)

    S2:E6

    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.

    Director:Unknown
    Writer:Unknown

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  23. H2O: Just Add Water Season 2 Episode 7 - In Hot Water
    7.4/10(195 votes)

    S2:E7

    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

    Director:Unknown
    Writer:Unknown

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  24. H2O: Just Add Water Season 2 Episode 9 - Riding for a Fall
    7.4/10(193 votes)

    S2:E9

    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.

    Director:Unknown
    Writer:Unknown

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  25. H2O: Just Add Water Season 2 Episode 14 - Get Off My Tail
    7.4/10(190 votes)

    S2:E14

    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.

    Director:Unknown
    Writer:Unknown

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Season 2 Ratings Summary

"Unfathomable" is the best rated episode of "H2O: Just Add Water" season 2. It scored 8.6/10 based on 257 votes. Directed by Unknown and written by Unknown, it aired on 3/21/2008. This episode is rated 0.1 points higher than the second-best, "Wrong Side of the Tracks".