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Episode 26: Examen
24min - The girls get resourceful to prevent the impact of the comet. Will they save Earth before graduation?
Episode 25: Möte med Ödet
24min - The girls must force a comet away from Earth using the magnetic crystals' powers.
Episode 24: För nära inpå
24min - Cleo shows concern for her job when her father gets a second gig at the marine park.
Episode 23: Strandfest
24min - A massive beach party leaves room for misunderstandings -- until real feelings come to light.
Episode 22: Makoprovet
24min - When the full moon rises early, the girls confront the water force and receive a message about Mako Island.
Episode 21: Juveltjuven
24min - The girls must recover a necklace containing a magic crystal when someone steals it to get Rikki's attention.
Episode 20: Drottning för en dag
24min - Sophie lands a job at the cafe, to Bella's chagrin.
Episode 19: Separation
24min - Will competes in the free-diving championship competition and breaks away from Sophie's influence.
Episode 18: In i ljuset
24min - Ryan sets out to explore Mako Island. To protect their secret, Rikki warns Bella and Cleo, and tries to stop Ryan from discovering the moon pool.
Episode 17: Magnetisk Attraktion
24min - Cleo's introduced to Ryan, a young geophysicist working for Samantha. Rikki's time at the moon pool leads to a discovery about her powers.
Episode 16: Den Mörka Sidan
24min - Rikki goes to Mako Island to confront the strange force in the moon pool.
Episode 15: Kraftmätning
24min - Sophie swipes Bella's idea for a fundraising concert at the cafe.
Episode 14: Sjöjungfrumagi
24min - Will pushes himself too far when Zane challenges him to a free-diving competition. The girls discover a crystal in the rock from the moon pool.
Episode 13: Att ha och att hålla tillbaka
24min - Kim tries derailing Don and Samantha's wedding as Lewis receives an opportunity to study in America.
Episode 12: Brott och straff
24min - When Rikki is held hostage, Will, Cleo and Bella must work together to save her.
Episode 11: Också bara en tjej
24min - When Bella helps Will with his diving, she tries to sort out his feelings for her. An unexpected booking has the cafe overrun with children.
Episode 10: Avslöjad
24min - As Will begins to piece the mermaid mystery together, Bella tries to keep her secret from him.
Episode 9: Magikerns lärling
24min - Cleo experiments with the magic moon pool water. Rikki later gets the water into Cleo's aquarium by accident.
Episode 8: Kidnappad
24min - Cleo hosts a sleepover for the girls on the night of the full moon -- until they end up on a rescue mission for Bella.
Episode 7: Lyckliga familjer
24min - Cleo and Kim get to know their father's new girlfriend. Bella applies for a job at the cafe.
Episode 6: Hemligheter & lögner
24min - Bella sets up a study date with Will. Lewis pulls inspiration from the moon pool for his science project.
Episode 5: Storslagna idéer
24min - Zane hosts a dirt bike race to help the cafe bring in money. Lewis and Cleo continue with their moon pool investigation.
Episode 4: Alla Hjärtans Dag
24min - The girls each are experiencing trouble in love as Cleo's father, Don, finds a pretty prospect.
Episode 3: Håll dina fiender nära
24min - Cleo seeks a new job as an assistant dolphin trainer at the Marine Park. Meanwhile, Rikki takes issue with Nate's band playing at the cafe.
Episode 2: Djungeljakt
24min - Will attempts to look into his experience on Mako Island, but Bella offers to direct him away from the moon pool to protect the girls' secret.
Episode 1: Uppvaknandet
24min - With their final year of high school ahead, Cleo and Rikki make a new friend in Bella, meet new boy Will and encounter a strange force on Mako Island.