Season 1, Episode 3
26 July 2013 (Netflix)
Attempting to capture Zac in his natural environment, Sirena, Lyla, and Nixie follow him to school. When their plan fails, the school principal, Rita Santos confronts them and confiscates Sirena's Moon Ring. In trying to get the Moon Ring back, the mermaids uncover Rita's secret.
- Dominic Deutscher as Cam
- Gemma Forsyth as Evie McLaren
- Rowan Hills ss David
- Brooke Nicole Lee as Carly
- Kerith Atkinson as Rita Santos
- Deshay Padayachey as Biology Teacher
- This is the first appearance of Rita.
- This is the first episode to show the characters at school.