Some of the best movies made about crime are those where the crime solver can get inside the head of the serial killer, and those are the techniques we use in C.S.I.
I've always thought really good artists in general are overqualified. You're paid to stand there and do a line, but the guy has probably gone to drama school... but they have developed it to be just, like, one specific line.
The thing that attracted me to 'CSI' is that these guys are always professional, but underneath, it's teeming with a heavy shadow. Maybe even some decadence and some weirdness with certain characters! And that always intrigued me as an actor.