But this is a really, really good show:
It's not just the subject matter that is good. The three actors (Andre Braugher in particular) are so well-suited to their roles, so believable, that they just carry along every episode. And the camera work is excellent, especially the sideways shots and cuts when the actors sit in the coffee shop and talk.
Just finishing its first season, so you have not missed too much yet. Highly recommended.