H2O: Just Add Water: Season 3
Season 3 Lore Primer
Key plot threads, lore context, and character stakes you need to remember before diving into this season.
- Picks up essential narrative continuity directly following the events of H2O: Just Add Water Season 2.
- Character alliances, factions, and personal loyalties undergo significant shifts under escalating stakes.
- Addresses unresolved cliffhangers and thematic mysteries introduced during previous seasons.
- Establishes the primary seasonal conflict that drives serialized character arcs toward the finale.
Episode Guide
Season 3 Progress Shield
The Awakening
Oct 26, 2009 · 24 min
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
Jungle Hunt
Oct 27, 2009 · 24 min
With Will finding out about Mako Island, Bella tries to misdirect his search so that he will not discover the Moon Pool. However, Lewis and the girls find out that the Moon Pool is
Keep Your Enemies Close
Oct 28, 2009 · 24 min
At the marine park, Cleo seeks a job as a dolphin trainer. Meanwhile, until she and Bella reach an understanding, Rikki fires Nate's band, preventing them from playing in the cafe.
Valentines Day
Oct 29, 2009 · 24 min
Cleo has to put off Lewis' romance plans in order to help Kim with her crazy love life. Meanwhile, Don meets up with a National Parks Manager, Samantha, and the two decide to date.
Big Ideas
Oct 30, 2009 · 24 min
To get more interest in the cafe, Zane develops a dirt bike race. However, Rikki finds out that it is a scam. She and Bella decide to team up to teach him a lesson. Meanwhile, Lewi
Secrets & Lies
Nov 2, 2009 · 24 min
Bella tries to get close to Will but when Bella goes to his place she sees him with another girl. Meanwhile Lewis tries to test the water from the moon pool but gets caught by his
Happy Families
Nov 3, 2009 · 24 min
Cleo's family and Sam go on a picnic to the beach, which leads to tension when Cleo refuses to go near the water. Kim abuses the fact that her father is happy in order to get lots
Kidnapped
Nov 4, 2009 · 24 min
During a full moon, the girls stay at Cleo's and Bella is attacked by the water creature. At the same time, Will decides to return to the moon pool after making the connection betw
The Sorcerer's Apprentice
Nov 5, 2009 · 24 min
Cleo starts to experiment on the moon pool water without Lewis' knowledge, but things start going wrong when Cleo's fish Hector gets trapped in the bubble of floating water. Meanwh
Revealed
Nov 6, 2009 · 24 min
After Bella gives Will a shell-like fossil she found while swimming, Will becomes suspicious as the fossil is of a rare kind. Rikki realises how close Will is to finding out their
Just A Girl At Heart
Jan 18, 2010 · 24 min
Bella helps Will with his free-diving training but when she realises he's more interested in her as a mermaid than a girl, she's hurt. Rikki and Cleo have to improvise when the caf
Crime & Punishment
Jan 19, 2010 · 24 min
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 toge
To Have & To Hold Back
Jan 21, 2010 · 24 min
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
Mermaid Magic
Feb 22, 2010 · 24 min
Will pushes himself too far when Zane challenges him to prove his skills as a free- diver. The girls discover a unique crystal in the rock from the Moon Pool.
Power Play
Feb 23, 2010 · 24 min
Sophie uses Bella's idea for a fundraising concert and presents it as her own to Rikki to gain publicity for the cafe. Cleo's caught in the crossfire with Kim when Samantha moves i
The Dark Side
Feb 24, 2010 · 24 min
Rikki's frustrated by the water attacks and goes to Mako Island on a full moon to confront the strange force in the Moon Pool. With Cleo and Bella delayed, Will pursues her and dis
A Magnetic Attraction
Feb 25, 2010 · 24 min
Cleo's introduced to Ryan, a young geophysicist who's working for Samantha. Rikki doesn't react well to Cleo consulting Ryan about the Mako rock and a fracture begins to appear in
Into The Light
Apr 12, 2010 · 24 min
Rikki fears Ryan's explorations on Mako Island will uncover their secrets but Cleo and Bella discount her concern. She almost goes too far trying to stop Ryan from discovering the
Breakaway
Apr 13, 2010 · 24 min
Will competes in the Free-Diving Championships but afterward chooses to break from the sport and shrug off Sophie's influence on his life. Rikki sees Sophie kissing Zane at the eve
Queen For A Day
Apr 13, 2010 · 24 min
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 Bell
The Jewel Thief
Apr 14, 2010 · 24 min
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.
Mako Masters
Apr 14, 2010 · 24 min
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 mes
Beach Party
Apr 15, 2010 · 24 min
Bella's eager to ask Will to the end of year party until she sees him asking Rikki. A big misunderstanding occurs which prompts Will to express his true feelings for Bella. Sophie
Too Close For Comfort
Apr 15, 2010 · 24 min
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 ea
A Date With Destiny
Apr 16, 2010 · 24 min
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
Graduation
Apr 16, 2010 · 24 min
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