Stars Indiana Evans and heart-throb Luke Mitchell

With 'Packed to the Rafter's' Angus McLaren and 'Home and Away's' Luke Mitchell When three normal girls stumble upon an ancient cavern they undergo a transformation that will change their lives forever. H2O Just Add Water sees three very different girls facing everyday teen problems with a twist they're mermaids with incredible powers! Its nearly the end of the holidays and Cleo and Rikki are about to face their last year of high school without Emma, who has gone overseas. Together with Lewis, theyre confident they know everything there is to know about Mako Island but when water attacks the girls on a full moon, they realise a new, potentially dangerous force is developing on the mysterious island. However the new girl, Bella, seems different. Is it possible they have found another mermaid? Join your favourite mermaids as they navigate through the trials of love, life, and high school in the last ever season of H2O Just Add Water!