Ep 18. Bad Moon Rising

Rikki is struggling with her ever-increasing powers and feels like she needs to learn how to control them before something goes wrong. Meanwhile, Lewis' science teacher assigns him and Cleo to work on a lunacy project, studying the effects of the full moon on behavior and ocean tides. However, the project takes a dark turn when a strange man enters the scene and starts behaving erratically during the full moon. The girls fear that he may be dangerous and go to investigate, but they soon find themselves in danger when they too become affected by the full moon. As tensions rise and the danger escalates, Rikki must confront her powers head on and learn to control them before it's too late. Will the girls be able to stop the man and protect themselves from the dangers of the full moon? Find out in this thrilling episode of H2O: Just Add Water!