I've been watching the new series "Dexter" on Showtime. By day, the main character, Dexter Morgan, is a blood spatter expert working for the Miami Police Department. By night, he's a serial killer with a heart. Or, he would be - if he had a heart. The hook is that Dexter knows he's a born killer, but he only uses his serial killing powers to kill people who deserve to die. I like that. You go, Dexter.