H2O: Just Add Water

An Australian teen fantasy television series that follows three teenage girls—Emma Gilbert (Claire Holt), Rikki Chadwick (Cariba Heine), and Cleo Sertori (Phoebe Tonkin)—who, after an adventure on the mysterious Mako Island, discover that they transform into mermaids with special powers when they come into contact with water. They decide to keep their new abilities a secret, facing various challenges of teenage life while concealing their secret from those around them. The series explores themes of friendship, responsibility, and self-discovery, blending elements of drama and fantasy.