H2O: Just Add Water S3, E19

Three girls become mermaids after a mysterious island transforms them and gives them special powers.

Cast:Cariba Heine , Phoebe Tonkin , Angus McLaren , Burgess Abernethy , Claire Holt , Alan David Lee , Cleo Massey , Jamie Timony , Ariu Lang Sio , Indiana Evans , Luke Mitchell , Brittany Byrnes , Taryn Marler , Caroline Marie Kenison , Trent Sullivan , Jared Robinsen , Annabelle Stephenson , Penni Gray