Despite everyone's references to the murder victims' as "ghosts," Michael Raines is hallucinating, not channelling dead people. He is able to turn this disability into a tool that helps him work through the crime, but there is nothing paranormal about his abilities. Raines is a mentally ill police officer coping with his disorder. The show does a good job of portraying both the struggles and benefits of such an existance. This is an important lesson that I am disappointed no one else has picked up on. Kids, and adults, need to see mentally ill people who are heros, not villians or victims.