15th September
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Battlelines is the fourteenth episode of Season 1 of Mako Mermaids. It will premiere in September.


Now that he knows Sirena, Lyla, and Nixie are mermaids, Zac starts to wonder why his school principal, Rita is helping them. This brings him to suspect that she may also be a mermaid. Meanwhile, Rita begins giving the girls lessons on how to use their powers. During a teacher-parent conference concerning his grades, Zac notices Rita's great caution around water, confirming his suspicion that she is also a mermaid. With this knowledge, he decides to use it to his advantage. With her cover blown, Rita tells the girls she must leave town before Zac exposes her. The girls decide to fight back by using their powers to disrupt Zac's life and nearly expose him in front of Evie.