'cause their blood spatter analyst is a serial killer?
Well their CSI guy is a sexual predator, the Lieutenant is more focused on keeping face than running the division, and the other detectives, one is to young, who let a serial killer go, one has a gambling problem, and one has anger issues. Really Batista is the only normal one and he's way to gullible to be an effective detective.
If you focus on any character other than the Lead and the seasons Guest Star you'll realize that Dexter isn't really that great of a show.
But I will say this, this season is going very well and I think it's because they've really worked on the continuity problems.