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Season 3

53 :03x01 - The Awakening

Cleo and Rikki are about to face their final year at school together without Emma, who?s gone overseas. They're confident they've overcome the affect of the full moon and know everything about Mako Island and its magic. Zane surprises Rikki with an offer for her to join him as a partner in a new upmarket cafe, while Lewis is taking his relationship with Cleo a little too comfortably. When Will, a boy with remarkable skills underwater stumbles upon the Moon Pool, he encounters a strange water force and is knocked unconscious. That night, at the opening of the new cafe, Rikki and Cleo meet Bella, a new girl who helps Rikki out of a tricky situation by stepping in to sing in Nate?s band. In a break outside, Rikki's attacked by water and dragged out to sea. Bella sees this and joins Cleo to rescue Rikki. Cleo's shocked to find Bella's a mermaid too! Rikki's saved from the encounter but they find the new boy Will in the Moon Pool. The girls realise something has changed on Mako Island, and it appears Will is now on the trail of their magic and secret.

Source: Nickelodeon

54 :03x02 - Jungle Hunt

First day back at school and the girls are surprised to discover Will's attending too. Will's thrilled to find Rikki and approaches her seeking help to return to Mako Island to find any confirmation of his earlier experience. Bella?s smitten with Will and enthusiastically volunteers to accompany him instead – to keep him from relocating the Moon Pool. Cleo and Lewis use the opportunity to do their own investigation in the cavern. Concerned Bella's in over her head, Rikki trails her and Will on the island and when Bella falls into the creek is able to dry her out. Will becomes suspicious when he finds Rikki on the island and doubly so when Bella accidentally uncovers the land entrance of the Moon Pool and they catch Cleo and Lewis in the cavern. The girls use the opportunity to interrogate Will to learn what he encountered on the night of the full moon. Sensing how close he is to their secrets, Rikki takes action and discounts his memory of the night. Will?s defused and Bella's left conflicted by what they did to convince him. After he's left, the girls and Lewis find evidence that the Moon Pool has changed and that it has new magic.

Source: Nickelodeon

55 :03x03 - Keep Your Enemies Close

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56 :03x04 - Valentine's Day

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57 :03x05 - Big Ideas

Zane?s management style is steering the cafe into debt and Rikki?s not impressed by his latest plans for a complementary dirt bike hire business. He concocts a dirt bike race, knowing he?s the best bike racer in town, to raise some urgent funds for the cafe. Bella helps Will enter and Zane?s surety of winning is threatened. Making amends for his disinterest in the water attacks, Lewis accompanies Cleo to return to Mako Island to investigate the new cascade in the Moon Pool. When Bella discovers that Nate and Zane plan to rig the race, Rikki decides to teach them a lesson. Bella uses her mermaid power to ensure their plan falls flat. Rikki makes her own event to help get the cafe out of debt, while Cleo and Lewis make a surprising discovery when they mix the waters from the pool and cascade in the Moon Pool.

Source: Nickelodeon

58 :03x06 - Secrets & Lies

Bella's infatuation with Will deepens and she can't help but follow him around! She tries to set up a study date, but finding herself stood up she confronts Will at the Boatshed only to discover he's apparently already got another girl! Lewis' apparatus to test the properties of the magical Mako water attracts the attention of their Science Teacher – Ms Taylor who believes it is his Science project. Caught with evidence of their Mako secrets, Lewis is in trouble until Cleo uses her powers to replicate the effect and help him submit an alternative project. Ignoring Rikki's advice, Bella continues to pursue the truth about Will and the mystery girl and follows them diving.

Source: Nickelodeon

59 :03x07 - Happy Families

Cleo's placed in an awkward situation when Don takes the family to the beach to help his daughters bond with his new partner Samantha. When Cleo is unable to join them in the water and accidentally hits Sam in the face with a towel, Don interprets Cleo's behaviour as a disapproval of Samantha and draws his relationship with Sam to an end. Seeing the upset she's caused, Cleo's quick to convince Don that she is cool with Sam and counsel Kim who's not. Rikki's put in the middle when Will?s ambitious sister Sophie competes with Bella for a job at the cafe.

Source: Nickelodeon

60 :03x08 - Kidnapped

The girls prepare to sleepover at Cleo's in an effort to protect themselves from any water attack. Lewis too is on the front foot and has installed a camera in the cavern of the Moon Pool to capture any evidence of the mysterious water force. Reminded of his previous experience on the last full moon, Will's inspired to return to Mako Island. When he arrives at Cleo's seeking Bella's assistance – Bella disappears! She's apparently been taken by a water tentacle to Mako Island. The girls rush to her rescue and charge Lewis to keep Will away.

Source: Nickelodeon

61 :03x09 - The Sorcerer's Apprentice

Disregarding Lewis' advice not to experiment with the gravity defying water they created from the Moon Pool, Cleo contrives an opportunity to keep him occupied for a day so she can. When Rikki accidentally gets the magic water in Cleo's aquarium, Cleo's favourite fish Hector becomes suspended in a floating bubble of water! Cleo's aghast when all their hasty efforts to retrieve Hector result in him going down the drain. The girls are joined by Bella and use their powers to retrieve Hector from the canal outside Cleo's home before he's lost forever.

Source: Nickelodeon

62 :03x10 - Revealed

Cleo and Rikki warn Bella to back off from Will as they know he's on the trail of their mermaid secrets. It's difficult for her as Will's becoming more intrigued by Bella and his increasing interest is making her feel a relationship may finally happen between them. Bella's left with no option but to stop seeing Will. Unfortunately, the directive comes too late as a close encounter with water leads Will to recognise Bella's secret and expose her as a mermaid! Bella's left on tenterhooks when Will stalls at keeping his incredible discovery private.

Source: Nickelodeon

63 :03x11 - Just A Girl At Heart

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64 :03x12 - Crime & Punishment

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65 :03x13 - To Have & To Hold Back

Don and Sam get married and Lewis gets a scholarship to the American marine biology institute and has to find a way to tell Cleo that he wants to go.

Source: TeenNick

66 :03x14 - Mermaid Magic

Zane resents Will having become part of the team but fails to make the girls doubt his reliability. Hearing Will needs a sponsor for his competitive diving without oxygen, Zane asks a demonstration claiming the café is interested. In fact he hires Cameron and Nate so he can cheat be diving 40 meter himself and receiving oxygen. Will decides to go for 60, fair, but ends up unconscious. Ricki arrives just in time as mermaid, finds out the truth and gets him a generous contract. Meanwhile, the Moonpool study shift from the controlled tentacle to the rock which swallowed Will's diving lamp. It turns out to contain a blue crystal, identical to the one Bella found in the Irish sea when she became a mermaid.

Source: TeenNick

67 :03x15 - Power Play

Sophie steals Bella's fund-raising idea. Elsewhere, Samantha moves into the Sertori home, where Kim struggles to accept her presence.

Source: TeenNick

68 :03x16 - The Dark Side

Rikki confronts the bizarre force in the Moon Pool, and the encounter changes her.

Source: TeenNick

69 :03x17 - A Magnetic Attraction

Cleo meets Ryan, a geophysicist working for her stepmother Samantha, and asks him to take a look at the Mako crystal. Rikki is not happy that Cleo is seeking outside help, causing cracks on the girls' relationship. So Rikki starts spending all her time in the Moon Pool and discovers that her powers have strengthened after encountering the water tentacle. Finally Will confesses to Bella and Cleo what really happened at the Moon Pool, despite promising Rikki not tell the others.

Source: TeenNick

70 :03x18 - Into The Light

Will cuts ties with Sophie and walks away from free diving. Meanwhile, Rikki spots Sophie kissing Zane.

Source: TeenNick

71 :03x19 - Breakaway

Will cuts ties with Sophie and walks away from free diving. Meanwhile, Rikki spots Sophie kissing Zane.

Source: TeenNick

72 :03x20 - Queen For A Day

Zane installs Sophie as head of staff at the cafe. Bella develops a sneezing allergy that also accidentally triggers her powers. Sophie seizes on the problem and looks to fire Bella and the band.

Source: TeenNick

73 :03x21 - The Jewel Thief

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.

Source: TeenNick

74 :03x22 - Mako Masters

The girls sit their final school exams and have to avoid a water attack in public when the full moon rises early. They confront the water force in the Moon Pool and are given a message about Mako Island.

Source: TeenNick

75 :03x23 - Beach Party

A misunderstanding leads Will to be honest with Bella. Elsewhere, Sophie pressures Zane to change the café's name.

Source: TeenNick

76 :03x24 - Too Close For Comfort

Don gets a second job at the Marine Park on the Pirate ship and outshines Cleo, threatening the future of her Dolphin show. Bella and Will find difficulty trying to connect with each others' interests.

Source: TeenNick

77 :03x25 - A Date With Destiny

The girls uncover some unsettling news at the Mako Pool regarding a comet.

Source: TeenNick

78 :03x26 - Graduation

After the Moon Pool gets damaged, the girls resort to using their own magic to save Earth from a destructive comet.

Source: TeenNick
Warning: H2O: Just Add Water guide may contain spoilers
Classification: Scripted
Genre: Action | Adventure | Family | Fantasy | Romance/Dating | Teens
Status: Canceled/Ended
Network: nickelodeon ( United Kingdom)
Airs: Fridays at 05:00 pm
Runtime: 30 Minutes
Premiere: July 07, 2006
Ended: April 27, 2010
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