Episode 1
Outcasts
Fri, Jul 26, 2013 25 mins
In the series premiere, mermaids Sirena, Lyla and Nixie fail to prevent teenager Zac from falling into the sacred Moon Pool and he magically turns into a merman. The three mermaids are banished from their pod and must venture onto land to live among humans in an attempt to find out how to reverse Zac's transformation.
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Episode 2
Getting Legs
Fri, Aug 2, 2013 25 mins
Using the power of Sirena's Moon Ring to give themselves legs, the mermaids begin their mission to transform Zac back into a human boy.
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Episode 3
Meeting Rita
Fri, Aug 9, 2013 25 mins
The mermaids attempt to capture Zac at school, but run into trouble with the principal, Rita Santos.
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Episode 4
Lyla Alone
Fri, Aug 16, 2013 25 mins
Lyla faces a dilemma after a waitress drops a drink on her and she transforms into her mermaid form.
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Episode 5
Blizzard
Fri, Aug 23, 2013 25 mins
When Lyla and Sirena attempt to use the powers of the Moon Ring to stop it raining, they cause a blizzard instead.
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Episode 6
Dolphin Tale
Fri, Aug 30, 2013 25 mins
David and his brother pursue an unusual creature when out fishing. Meanwhile, the mermaids seek to become friends with Zac in the hopes he'll share his secret with them.
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Episode 7
Zac's Pool Party
Fri, Sep 6, 2013 25 mins
Zac struggles to keep his merman identity a secret after his girlfriend Evie organises a pool party for him. Meanwhile Lyla's attempts to befriend Zac arouse Evie's suspicions.
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Episode 8
Zac's Return to Mako
Fri, Sep 13, 2013 25 mins
The mermaids believe that if they keep Zac from the light of a full moon his merman powers will be lost.
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Episode 9
The Siren
Fri, Sep 20, 2013 25 mins
Sirena believes if she sings a forbidden enchantment song to Zac, he will fall under her spell. Meanwhile, Zac tries to help Evie by stealing a copy of a test.
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Episode 10
Zac Returns to Mako
Fri, Sep 13, 2013 25 mins
Lyla takes Zac to the Moon Pool, thinking that if she can figure out how he became a merman, the mermaids will discover how to transform him back.
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Episode 11
I Don't Believe in Mermaids
Fri, Oct 4, 2013 25 mins
Nixie despairs that the pod will never return to Mako; Rita warns the mermaids about Zac's interest in the trident of merman legend.
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Episode 12
Close Call
Fri, Oct 11, 2013 25 mins
While Sirena is collecting shells to make bracelets to earn money, Zac catches a glimpse of her tail; Evie is concerned about Zac's friendship with Lyla.
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Episode 13
Betrayal
Fri, Oct 18, 2013 25 mins
When the full moon arrives, the mermaids must stop Zac from returning to Mako Island and obtaining the trident.
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Episode 14
Battlelines
Fri, Oct 25, 2013 25 mins
Once Zac knows Sirena, Lyla and Nixie are mermaids, he begins to suspect Rita must also be one.
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Episode 15
Sirena's Secret
Fri, Nov 1, 2013 25 mins
Lyla and Nixie become concerned that Sirena has fallen in love with David and might not want to go back to life at sea, so they sabotage her audition to sing with David at the cafe.
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Episode 16
Truce
Fri, Nov 8, 2013 25 mins
After Cam uses his mobile to film Zac swimming as a merman but loses his phone, the boys and the mermaids must work together to find it before Zac's secret is exposed.
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Episode 17
Moon Ring 2
Fri, Nov 15, 2013 25 mins
When Zac finds a ring on the ocean floor and gives it to Evie, Sirena sees it is a Moon Ring, and the mermaids attempt to recover it before Evie wears it in moonlight.
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Episode 18
The Trident Job
Fri, Nov 22, 2013 25 mins
The mermaids volunteer to work at a Halloween party at the cafe so they can keep an eye on Zac, who plans to return to Mako Island for the trident.
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Episode 19
Where's the On Button?
Fri, Nov 29, 2013 25 mins
Zac has difficulty unlocking the trident's powers and decides to seek out information from Rita.
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Episode 20
Nowhere to Hide
Fri, Dec 6, 2013 25 mins
Rita warns Zac about the dangers of the trident's powers; Evie is surprised by Rita's praise for her magazine article; and Cam unwittingly leads the mermaids to Zac.
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Episode 21
Aquata Returns
Fri, Dec 13, 2013 25 mins
Sirena's sister informs her the mermaid council have decided to allow her to return to the pod. Meanwhile, Zac finds the Moon Pool's entrance and pressures Lyla and Nixie to give him information.
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Episode 22
Evie Times Two
Sun, Dec 15, 2013 25 mins
Evie's curiosity about Rita's big seafood order leads to Rita's cat magically taking Evie's shape.
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Episode 23
Zac's Choice
Sun, Dec 22, 2013 25 mins
Rita instructs the mermaids on how to use the Moon Rings; Lyla attempts to stop Zac from taking back the trident, but is left unconscious after a bolt of energy hits her.
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Episode 24
Trust
Sun, Dec 29, 2013 25 mins
Zac and Cam fight over Zac's decision to give up the trident; Nixie feels she can't trust Zac, even though Sirena and Lyla are willing to give him a second chance.
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Episode 25
Betrayed
Sun, Jan 5, 2014 25 mins
When Cam offers to assist Nixie in transferring the trident so it is kept away from Zac, Evie is determined to accompany him to Mako Island.
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Episode 26
Decision Time
Sun, Jan 12, 2014 25 mins
In the first-season finale, Cam continues to trick Nixie into believing he is keeping the trident safe from Zac and not after the power himself. Meanwhile, Lyla and Sirena propose Rita return to the pod with them; Evie agrees to keep Zac's secret for one day; and Sirena says farewell to David.
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