I Watch "Cold Case"
I love this show, because the cases that these detectives get to go on are really interesting. I love how the episodes focus both on the present and past as they dig deeper and deeper into solving these cold cases. Of course, by the end of the episode they usually solve the case, but I've seen the odd episode or two where they couldn't, and I almost like those better, because a lot of the real life cases are cold for a reason: real lack of evidence, especially if it's a murder case.