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The Best Episodes of H2O: Just Add Water Season 1

Every episode of H2O: Just Add Water Season 1 ranked from best to worst. Discover the Best Episodes of H2O: Just Add Water Season 1!

Binge this in 10h 0m•Peaking at 8.4/10

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 1 Episode 26 - A Twist in the Tail
    8.4/10(257 votes)

    S1:E26

    Dr Denman sets up a trap for the girls at Mako Island and Zane is forced to decide who he should be helping.

    Director:Jeffrey Walker
    Writer:Unknown

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  2. H2O: Just Add Water Season 1 Episode 18 - Bad Moon Rising
    8.1/10(252 votes)

    S1:E18

    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.

    Director:Jeffrey Walker
    Writer:Unknown

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  3. H2O: Just Add Water Season 1 Episode 22 - Fish Out Of Water
    8.0/10(231 votes)

    S1:E22

    Emma and Cleo are concerned about Rikki going out with Zane. They force Rikki to decide to either be with Zane or with them.

    Director:Jeffrey Walker
    Writer:Unknown

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  4. H2O: Just Add Water Season 1 Episode 23 - In Too Deep
    8.0/10(237 votes)

    S1:E23

    Rikki finds a locket that looks the same as Miss Chatham's in a Jewellery shop and she is determined to get it.

    Director:Jeffrey Walker
    Writer:Unknown

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  5. H2O: Just Add Water Season 1 Episode 25 - Dr. Danger
    8.0/10(233 votes)

    S1:E25

    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.

    Director:Jeffrey Walker
    Writer:Unknown

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  6. H2O: Just Add Water Season 1 Episode 21 - Red Herring
    7.9/10(228 votes)

    S1:E21

    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.

    Director:Jeffrey Walker
    Writer:Unknown

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  7. H2O: Just Add Water Season 1 Episode 24 - Love Potion #9
    7.9/10(228 votes)

    S1:E24

    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.

    Director:Jeffrey Walker
    Writer:Unknown

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  8. H2O: Just Add Water Season 1 Episode 17 - Under the Weather
    7.8/10(248 votes)

    S1:E17

    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.

    Director:Jeffrey Walker
    Writer:Unknown

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  9. H2O: Just Add Water Season 1 Episode 20 - Hook, Line and Sinker
    7.8/10(241 votes)

    S1:E20

    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.

    Director:Jeffrey Walker
    Writer:Unknown

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  10. H2O: Just Add Water Season 1 Episode 7 - Moon Spell
    7.7/10(284 votes)

    S1:E7

    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.

    Director:Colin Budds
    Writer:Max Dann

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  11. H2O: Just Add Water Season 1 Episode 16 - Lovesick
    7.7/10(241 votes)

    S1:E16

    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.

    Director:Jeffrey Walker
    Writer:Unknown

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  12. H2O: Just Add Water Season 1 Episode 1 - Metamorphosis
    7.6/10(459 votes)

    S1:E1

    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.

    Director:Colin Budds
    Writer:Philip Dalkin

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  13. H2O: Just Add Water Season 1 Episode 10 - The Camera Never Lies
    7.6/10(261 votes)

    S1:E10

    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.

    Director:Colin Budds
    Writer:Deb Cox

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  14. H2O: Just Add Water Season 1 Episode 12 - The Siren Effect
    7.6/10(260 votes)

    S1:E12

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

    Director:Colin Budds
    Writer:Susan MacGillicuddy

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  15. H2O: Just Add Water Season 1 Episode 15 - The Big Chill
    7.6/10(238 votes)

    S1:E15

    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.

    Director:Jeffrey Walker
    Writer:Unknown

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  16. H2O: Just Add Water Season 1 Episode 13 - Shipwrecked
    7.5/10(245 votes)

    S1:E13

    Emma invites Miss Chatham to stay at her place and Zane overhears Miss Chatham's concerns about 'her treasure'.

    Director:Colin Budds
    Writer:Philip Dalkin

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  17. H2O: Just Add Water Season 1 Episode 2 - Pool Party
    7.4/10(350 votes)

    S1:E2

    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.

    Director:Colin Budds
    Writer:Deb Cox

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  18. H2O: Just Add Water Season 1 Episode 5 - Something Fishy
    7.4/10(293 votes)

    S1:E5

    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.

    Director:Colin Budds
    Writer:Joanne Watson

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  19. H2O: Just Add Water Season 1 Episode 6 - Young Love
    7.4/10(275 votes)

    S1:E6

    Emma gets into trouble babysitting her little brother Elliot. She goes to Lewis for help when Elliot develops a crush on Rikki.

    Director:Colin Budds
    Writer:Sam Carroll

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  20. H2O: Just Add Water Season 1 Episode 4 - Party Girls
    7.3/10(299 votes)

    S1:E4

    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.

    Director:Colin Budds
    Writer:Anthony Morris

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  21. H2O: Just Add Water Season 1 Episode 8 - The Denman Affair
    7.3/10(260 votes)

    S1:E8

    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

    Director:Colin Budds
    Writer:Chris Anastassiades

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  22. H2O: Just Add Water Season 1 Episode 9 - Dangerous Waters
    7.3/10(262 votes)

    S1:E9

    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.

    Director:Colin Budds
    Writer:Anthony Morris

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  23. H2O: Just Add Water Season 1 Episode 14 - Surprise!
    7.3/10(238 votes)

    S1:E14

    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.

    Director:Jeffrey Walker
    Writer:Chris Anastassiades

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  24. H2O: Just Add Water Season 1 Episode 3 - Catch of the Day
    7.2/10(311 votes)

    S1:E3

    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.

    Director:Colin Budds
    Writer:Simon Butters

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  25. H2O: Just Add Water Season 1 Episode 11 - Sink or Swim
    7.2/10(244 votes)

    S1:E11

    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.

    Director:Colin Budds
    Writer:Max Dann

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Season 1 Ratings Summary

"A Twist in the Tail" is the best rated episode of "H2O: Just Add Water" season 1. It scored 8.4/10 based on 257 votes. Directed by Jeffrey Walker and written by Unknown, it aired on 12/29/2006. This episode is rated 0.3 points higher than the second-best, "Bad Moon Rising".