Three teenage girls gain the power to turn into mermaids every time they touch the water and embark on the most exciting adventures in the depths of the sea.
The girls' powers are enhanced under the influence of a full moon and they wreak havoc on Lewis, leading him to be scared of them. Suitable for children aged 8+. (S2, ep 1)
Emma uses her abilities to help Elliott. Meanwhile, Lewis tests the girls' new powers, leading Cleo to dump him. Suitable for children aged 8+. (S2, ep 2)
Zane's back in town and still in love with Rikki. Meanwhile, a newly single Cleo becomes suspicious of Lewis and Charlotte. Suitable for children aged 8+. (S2, ep 3)
Rikki comes to stay at Emma's house and stirs up the family unit. In trying to compete, Emma tries to rebel and throws a party. Suitable for children aged 8+. (S2, ep 4)
Lewis finds an old book and tests out a potion on the girls. Meanwhile, Cleo uses her powers to try and get Don and her mum together. Suitable for children aged 8+. (S2, ep 5)
Cleo is shocked to find Don's new girlfriend is Charlotte's mother. Meanwhile, Lewis becomes aware of Charlotte's crush on him. Suitable for children aged 8+. (S2, ep 6)
A prank gone wrong results in a missing dolpin at the Marine Park, and Lewis has to take the fall. Can the girls clear his name? Suitable for children aged 8+. (S2, ep 7)
Rikki has to overcome her shame about her background and introduce her Zane to her dad. Suitable for children aged 8+. (S2, ep 8)
Emma meets a handsome horse-riding instructor. Meanwhile, Lewis manages to invite both Charlotte and Cleo to an awards dinner. Suitable for children aged 8+. (S2, ep 9)
Cleo struggles when she's assigned Charlotte as a tutor. Later, she realises she wants Lewis back, but is it too late? Suitable for children aged 8+. (S2, ep 10)
Zane discovers an underwater treasure and asks the girls to find it. But when Rikki is injured, can they rescue her? Suitable for children aged 8+. (S2, ep 11)
Emma has a reaction after pricking her finger on coral. As she starts acting more like a fish, Lewis has to find a way to cure her. Suitable for children aged 8+. (S2, ep 12)
A camping trip to Mako Island during a full moon causes drama, especially when Charlotte almost slips into the moon pool. Suitable for children aged 8+. (S2, ep 13)
Emma thinks she's going to get a promotion at the juice bar but Ash is given the job. Meanwhile, Lewis stands up to Charlotte. Suitable for children aged 8+. (S2, ep 14)
Lewis and Zane discover an old myth about mermaids. But their plan backfires when Nate gets his hands on the secret! Suitable for children aged 8+. (S2, ep 15)
The mermaids are at risk of being discovered when Cleo finds herself in trouble underwater in front of a crowd of people. Suitable for children aged 8+. (S2, ep 16)
Cleo and Rikki convince Ash to ask Emma out again, but with all the girls moonstruck, he looks set to discover Emma's secret. Suitable for children aged 8+. (S2, ep 17)
When Zane and Ash clash, Rikki and Emma take their boyfriends's sides, leaving Cleo alone to celebrate their mermaid anniversary. Suitable for children aged 8+. (S2, ep 18)
Lewis tries to track down a man who did research in to Mako Island 50 years earlier. Suitable for children aged 8+. (S2, ep 19)
Through Max's research, the girls discover Charlotte's grandmother was Gracie, an old mermaid! Suitable for children aged 8+. (S2, ep 20)
After discovering she's the granddaughter of a mermaid, Charlotte heads to the moon pool to become a mermaid herself! Suitable for children aged 8+. (S2, ep 21)
Bubble, Bubble, Toil and Trouble: When Charlotte almost turns into a mermaid in public, the girls discover she has all three mermaid powers. Suitable for children aged 8+. (S2, ep 22)
Despite the girls' attempts to keep Charlotte under control, she manages to use her powers on Nate and almost exposes them all. Suitable for children aged 8+. (S2, ep 23)
Charlotte causes issues with the other girls by annoying Rikki, and trapping Cleo and Emma in a pool room. Suitable for children aged 8+. (S2, ep 24)
Bullied by Charlotte, Cleo runs away. With everyone worried, is it time Lewis discovers what Charlotte has been up to? Suitable for children aged 8+. (S2, ep 25)
The full moon rises, and it could remove mermaid powers for good. But a plan to rid Charlotte of her powers backfires! Suitable for children aged 8+. (S2, ep 26)