MostofusthinkthatObsessiveCompulsiveDisorder(OCD)isjustoverfussytidying.Butit'sactuallymuchmoreserious.Sophiehastocheckthatshehasn'tkilledpeople,lookingfordeadbodieswherevershegoes,Richardisterrifiedoftouchingthebin,andNandaisabouttohavepioneeringbrainsurgerytostopherworryingaboutcomponentsonherbody-thathereyebrow...