Normally I don't watch this show. I don't really know why. I have seen one other episode which was also very good but this one was guest starring Frankie Muniz as a comic book writer who lost his fiance to a gang. They raped and killed her making him watch. The episode was inspired by the "Sin City" look. And I liked that while it did that, it didn't go over board with it.
Sidenote: Is it just me or does he (Muniz) always sound like he has a cold?
Criminal Minds on IMDB