I learned that I suffered from bipolar II disorder, a less serious variant of bipolar I, which was once known as manic depression. The information was naturally frightening; up to 1 in 5 people with bipolar disorder will commit suicide, and rates may even be higher for those suffering from bipolar II.
No, look, there's a blue box. It's bigger on the inside than it is on the outside. It can go anywhere in time and space and sometimes even where it's meant to go. And when it turns up, there's a bloke in it called The Doctor and there will be stuff wrong and he will do his best to sort it out and he will probably succeed cos he's awesome. Now sit down, shut up, and watch 'Blink'.