8.6/10217 votesLoading...#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?
Director: N/A
Writer: N/A
8.5/10187 votesLoading...#2 - 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?
Director: N/A
Writer: N/A
8.4/10206 votesLoading...#3 - A Twist in the Tail
Season 1 Episode 26 - Aired 12/29/2006
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: N/A
8.4/10187 votesLoading...#4 - 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.
Director: N/A
Writer: N/A
8.4/10170 votesLoading...#5 - 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?
Director: N/A
Writer: N/A
8.3/10203 votesLoading...#6 - 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!
Director: N/A
Writer: N/A
8.2/10164 votesLoading...#7 - 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?
Director: N/A
Writer: N/A
8.1/10198 votesLoading...#8 - Bad Moon Rising
Season 1 Episode 18 - Aired 11/3/2006
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: N/A
8.1/10148 votesLoading...#9 - To Have & To Hold Back
Season 3 Episode 13 - Aired 1/21/2010
Kim attempts to derail Don and Samantha's wedding. Lewis receives an opportunity to study in America. Cleo realises she's got to let Lewis live his own life and let him go overseas.
Director: Jeffrey Walker
Writer: N/A
8.1/10179 votesLoading...#10 - Graduation
Season 3 Episode 26 - Aired 4/16/2010
Sophie and Ryan damage the Moon Pool in their efforts to obtain the rare crystals. The girls improvise and use their own magic to prevent the impact of the comet and a planet wide catastrophe. Rikki, Cleo and Bella graduate with a surprise.
Director: N/A
Writer: N/A
8.0/10186 votesLoading...#11 - Fish Out Of Water
Season 1 Episode 22 - Aired 12/1/2006
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: N/A
8.0/10188 votesLoading...#12 - In Too Deep
Season 1 Episode 23 - Aired 12/8/2006
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: N/A
8.0/10180 votesLoading...#13 - Dr. Danger
Season 1 Episode 25 - Aired 12/22/2006
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: N/A
8.0/10155 votesLoading...#14 - 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"
Director: N/A
Writer: N/A
8.0/10157 votesLoading...#15 - 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.
Director: N/A
Writer: N/A
8.0/10180 votesLoading...#16 - 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.
Director: Jeffrey Walker
Writer: N/A
8.0/10151 votesLoading...#17 - Crime & Punishment
Season 3 Episode 12 - Aired 1/19/2010
Rikki receives counterfeit money at the cafe and is held captive by criminals on a boat. Bella and Cleo are forced to reveal the trio's secret to Will so they can rescue Rikki together.
Director: Jeffrey Walker
Writer: N/A
7.9/10182 votesLoading...#18 - Red Herring
Season 1 Episode 21 - Aired 11/24/2006
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: N/A
7.9/10184 votesLoading...#19 - Love Potion #9
Season 1 Episode 24 - Aired 12/15/2006
With 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.
Director: Jeffrey Walker
Writer: N/A
7.9/10160 votesLoading...#20 - 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...
Director: N/A
Writer: N/A
7.9/10170 votesLoading...#21 - 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.
Director: N/A
Writer: N/A
7.9/10150 votesLoading...#22 - 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.
Director: N/A
Writer: N/A
7.9/10147 votesLoading...#23 - A Date With Destiny
Season 3 Episode 25 - Aired 4/16/2010
Cleo discovers a comet is causing fish to flee the waters around Mako Island. The girls find a way to restart the message in the Moon Pool and discover the comet will collide with earth. Sophie meets Ryan and with Zane's help they join forces to remove the crystals from the Moon Pool.
Director: N/A
Writer: N/A
7.8/10190 votesLoading...#24 - Under the Weather
Season 1 Episode 17 - Aired 10/27/2006
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: N/A
7.8/10191 votesLoading...#25 - Hook, Line and Sinker
Season 1 Episode 20 - Aired 11/17/2006
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: N/A
The Best Episodes of H2O: Just Add Water
Every episode of H2O: Just Add Water ranked from best to worst. Let's dive into the Best Episodes of H2O: Just Add Water!
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...
Genres:DramaFamilySci-Fi & Fantasy
Network:Network Ten
Best Episodes Summary
"Unfathomable" is the best rated episode of "H2O: Just Add Water". It scored 8.6/10 based on 217 votes. Directed by N/A and written by N/A, it aired on 3/21/2008. This episode scored 0.1 points higher than the second highest rated, "Sea Change".