A unusual and rare planetary alingment is set to cause the full moon to remove a mermaids powers if they enter the moon pool! Charlotte shows immunity and tries to reveal the girls' secret before Lewis takes her to Mako Island. The girls follow and a battle erupts. But who will win?
Elenco: Cariba Heine , Phoebe Tonkin , Angus McLaren , Cleo Massey , Burgess Abernethy , Indiana Evans , Alan David Lee , Jamie Timony , Luke Mitchell , Craig Horner , Taryn Marler , Trent Sullivan , Caroline Kennison .