Bipolar. Also known as maniac depression. Symptoms include "mood swings" from hyperactive to depressed. Louis knows this. His mom's told him about it one time. Harry has been acting differently. For some time he'll be bouncing off the walls, then the next he's locked himself in his room. Louis' worried. So is Harry's mum, Simon, Paul and the rest of the band. They say he should just see the doctor, just so he can maybe find out why he's acting like this. Management on the other hand thinks it's all just a show. Harry knows the truth though. He's known for quite some time. But he won't tell anyone.