Mako Mermaids Betrayal (2013– ) Online
Rita and the girls worry about the upcoming full moon's effect on Zac. Nixie thinks they should let Zac find the trident so they can take it from him and hide it. Lyla thinks they should come clean with him so he'll in hopes that he'll understand and stay away from it. While Lyla warns Zac to keep away from Mako Island during the full moon, Evie sees them holding hands and breaks up with him. Cam discovers that the girls know Zac's secret but feels uneasy about them helping him. Under the light of the full moon, Zac goes after the trident with the girls close behind. They prevent him from attaining it but he sees them in mermaid form, causing him to become angry.
| Episode cast overview: | |||
 | Lucy Fry | - | Lyla |
 | Ivy Latimer | - | Nixie |
 | Amy Ruffle | - | Sirena |
 | Chai Hansen | - | Zac (as Chai Romruen) |
 | Dominic Deutscher | - | Cam |
 | Gemma Forsyth | - | Evie |
 | Rowan Hills | - | David |
 | Brooke Nichole Lee | - | Carly (as Brooke Lee) |
 | Kerith Atkinson | - | Rita |
In this episode Zac finally learns that the girls are mermaids and feels betrayed