Cleo considers accepting an invitation to popular socialite Miriam's pool party. Emma faces tough decisions about her future as a swimmer. Rikki discovers something new.
Cleo receives a mysterious warning: do not stare at the full moon, not even its reflection. Emma is more concerned about her father's surprise birthday party.
Lewis gets a job as lab assistant to the beautiful Dr Denman in an effort to find more answers for the girls, but they're not convinced he can keep their secret.
Not convinced an interview with Emma's mum will win the short film competition, Rikki decides to get some award-winning shark footage. Zane recruits Lewis to re-enact a record windsurfing run.
Byron asks Emma to coach him for the school swimming carnival. Rikki vents her frustration at Lewis's apparent disinterest in the girls as anything other than specimens.
Cleo's cousin Angela is a force to be reckoned with, and while Cleo's dad mistakes her for a model of maturity, she proves to be a reckless wild child.