H2O: Just Add Water
Three friends discover they become mermaids when in contact with water.
The Awakening
S3 E1
Rikki and Cleo face their final year of high school without Emma.
Jungle Hunt
S3 E2
Bella tries to keep Will away from the Moon Pool; the Moon Pool has changed.
Keep Your Enemies Close
S3 E3
Cleo wants to be an assistant dolphin trainer; Rikki fires Nate's band.
Valentine's Day
S3 E4
Cleo puts Lewis' Valentine's plans on hold; Don dates a woman named Samantha.
Big Ideas
S3 E5
Zane promotes the cafe with a dirt bike race.
Secrets & Lies
S3 E6
Bella tries to start a relationship with Will, but sees that he's got another girl; Lewis tests the magic water at school and attracts the attention of the science teacher.
Happy Families
S3 E7
A picnic leads Don to end his relationship with Samantha until Cleo encourages him to pursue it; Sophie competes with Bella for a job and sets her sights on Zane.
Kidnapped
S3 E8
Rikki and Bella hide out at Cleo's to protect themselves from a full moon water attack. Bella's kidnapped by a water tentacle; Lewis tries to keep Will away.
The Sorcerer's Apprentice
S3 E9
Cleo experiments with the magic Moon Pool water; Rikki accidentally gets the water into Cleo's aquarium.
Revealed
S3 E10
Will discovers that Bella is a mermaid.
Just a Girl at Heart
S3 E11
Will is more interested in Bella as a mermaid than as a person.
Crime & Punishment
S3 E12
The trio reveals their secret to Will in order to save Rikki.
To Have & to Hold Back
S3 E13
Kim tries to ruin Don and Samantha's wedding; Lewis may go to America.
Mermaid Magic
S3 E14
Zane challenges Will's free-diving skills; a unique crystal is found in the Moon Pool.
Power Play
S3 E15
Sophie steals Bella's fundraiser idea; Samantha moves in.
The Dark Side
S3 E16
Rikki confronts the force in the Moon Pool.
A Magnetic Attraction
S3 E17
Cleo meets a geophysicist and shows him the Mako rock.
Into the Light
S3 E18
Rikki fears Ryan will find out their secret when he begins spending more time on Mako Island.
Breakaway
S3 E19
Will gives up free-diving; Sophie kisses Zane.
Queen for a Day
S3 E20
Sophie becomes manager of the cafe; Bella can't stop sneezing.
The Jewel Thief
S3 E21
Zane steals a Mako crystal to get Rikki's attention.
Mako Masters
S3 E22
The girls take their final exams; the water force attacks early.
Too Close for Comfort
S3 E24
Cleo's dad gets a second job; Bella and Will try to find similar interests.
A Date With Destiny
S3 E25
A comet is causing fish to flee from Mako Island.
Graduation
S3 E26
The Moon Pool is damaged after the crystals have been harvested; a comet heads for Earth.
Stormy Weather
S2 E1
The girls' powers are enhanced during the full moon.
Control
S2 E2
Emma uses her powers to help Elliott win at Soccer; Lewis decides to test the girls powers.
The One That Got Away
S2 E3
Zane is back and tries to win back Rikki; Cleo becomes suspicious of Lewis.
Fire and Ice
S2 E4
Rikki comes to stay at Emma's house and stirs things up.
Hocus Pocus
S2 E5
Lewis tests a potion on the girls he found in an old book.
Pressure Cooker
S2 E6
Don appears to have a girlfriend; Lewis becomes aware of Charlotte's feelings.
In Hot Water
S2 E7
A dolphin goes missing at marine Park following a mermaid prank gone wrong.
Wrong Side of the Tracks
S2 E8
Zane unknowingly has an argument with Rikki's father; Rikki must overcome her shame about her background.
Riding for a Fall
S2 E9
Emma meets a handsome riding instructor; Emma must use her powers to heal an ill horse.
Missed the Boat
S2 E10
Charlotte is assigned as a tutor for Cleo; Cleo's attitude toward Charlotte drives Lewis away.
Fish Fever
S2 E12
Emma pricks her finger on coral and starts acting strangely.
Moonwalker
S2 E13
Don takes the family camping during a full moon and the girls become affected.
Get Off My Tail
S2 E14
Ash, returning as Juice Bar supervisor, fires Emma and then re-instates her; Ash asks Emma out.
Irresistible
S2 E15
Nate gets a potion irresistible to mermaids and all three girls go wild for him.
Double Trouble
S2 E16
Elliot falls for Kim; Cleo and Lewis chaperone Elliot and Kim's date; Kim dumps Elliot.
Moonstruck
S2 E17
Emma makes the girls promise to not tell Ash she's a mermaid; Ash and Emma kiss for real.
The Heat Is On
S2 E18
Zane and Ash fight while Rikki and Emma take sides; Cleo gets them back together.
The Gracie Code
S2 E19
Lewis' research leads him to Gracie's boyfriend from the 50s; Max tells Lewis to hold onto his love.
The Gracie Code
S2 E20
Charlotte discovers Gracie is her grandmother; Charlotte see film of Gracie as a mermaid.
And Then There Were Four
S2 E21
Charlotte accuses Lewis of lying; Charlotte enters the moon pool and gets a tail.
Bubble Bubble Toil and Trouble
S2 E22
The girls run into Charlotte as a mermaid; Lewis wants Charlotte accepted into the group.
Reckless
S2 E23
Charlotte causes mischief; Charlotte picks on Cleo.
Three's Company
S2 E24
Rikki leaves the group; Zane tries to make Rikki normal.
Sea Change
S2 E25
Cleo runs away to the ocean; Lewis finds out what Charlotte has been up to.
Unfathomable
S2 E26
The full moon rises, Lewis tries to lure Charlotte to the moon pool.
Metamorphosis
S1 E1
Three teenage girls discover a secret pool when they are stranded on Mako Island.
Pool Party
S1 E2
Cleo, Emma and Rikki fear that their secret will get out when they attend a pool party.
Catch of the Day
S1 E3
Cleo must overcome her fear of water in order to enjoy being a mermaid.
Party Girls
S1 E4
Lewis tests the girls' powers; Cleo's younger sister becomes suspicious when she reads Cleo's diary.
Something Fishy
S1 E5
Cleo gets a job feeding the dolphins at a marine park; Emma has a sleepover party.
Young Love
S1 E6
Elliot falls in love with Rikki after she saves him from drowning at the beach.
Moon Spell
S1 E7
The girls ignore Miss Chatham's advice to beware of trouble when there is a full moon.
The Denman Affair
S1 E8
On the verge of discovering how the girls transform, Lewis considers revealing their secret to a beautiful marine biologist.
Dangerous Waters
S1 E9
While trying to buy a fish for Cleo, Rikki finds herself involved in a fish-smuggling operation.
The Camera Never Lies
S1 E10
Zane and Emma each try to make their own short film to enter into a contest at the juice bar.
Sink or Swim
S1 E11
Byron persuades Emma to train him for a swimming competition; Rikki plays pranks on Lewis to try and unsettle him.
The Siren Effect
S1 E12
The full moon turns Cleo into a magical siren who attracts boys with her angelic voice.
Shipwrecked
S1 E13
Emma witnesses Miss Chatham arguing with Zane because she accidentally hit his jet-ski with her boat.
Surprise!
S1 E14
Zane believes that a mysterious creature is living under the sea and decides to mount an expedition to catch the monster.
The Big Chill
S1 E15
Wilfred leaves Emma in charge of the juice bar for a weekend while he goes away to a conference.
Lovesick
S1 E16
A misunderstanding leads everyone to believe that Cleo and Zane are dating and planning on running away together.
Under the Weather
S1 E17
When a rainy day traps the girls at Emma's house, they all pretend to be sick so that they do not have to go to school.
Bad Moon Rising
S1 E18
Rikki escapes to Mako Island after accidentally burning Emma during a full moon.
Hurricane Angela
S1 E19
Cleo and Kim's relationship is strained when their manipulative cousin comes to visit.
Hook, Line and Sinker
S1 E20
Cleo tries to help Lewis win a fishing competition; Rikki and Zane are trapped together on the balcony of a fancy hotel.
Red Herring
S1 E21
Zane finds evidence linking Miss Chatham to a decades-old mermaid sea rescue; Zane pursues Rikki.
In Too Deep
S1 E23
Rikki is furious when Miriam ruins her plan to buy an old locket from the local jewelry store.
Love Potion No. 9
S1 E24
Cleo and Emma hope that Lewis and Byron will ask them to the school dance.
Dr. Danger
S1 E25
Dr. Denman returns to do research on Mako Island; Emma tries to avoid going on a family beachside holiday.
A Twist in the Tail
S1 E26
The girls use the lunar eclipse to avoid being exposed by Dr. Denman.