OK, I know I am a little late on this one, but after a recommendation from a friend I decided to give Dexter, a Showtime series, a chance. The first 2 seasons are available on Netflix "Watch Instantly", so I was able to watch it for free instantly. 2 episodes in and I was hooked.

Meet Dexter Morgan. By day he's a blood splatter pattern expert for the Miami Metro police department. But by night - he takes on an entirely different persona: serial killer. But Dexter isn't your average serial killer as he only kills people who fit a very prolific and precise "moral code" taught to him by his late father Harry (he didn't kill Harry, honest), and developed very thoroughly throughout each kill.

In a nut shell, Dexter is about a guy who works for the police department as a forensic expert, but doubles a serial killer who only kills bad guys. It is am excellent show, and I highly recommend it. Like I said, seasons 1 & 2 are available on Netflix "Watch Instantly", season 3 is on DVD, and season 4 will be out soon.