This isn't a short-lived show that you can marathon in a weekend. But it's fun to pick out your favorite story arc and knock out many episodes in a row (or just let the new ones accumulate on your DVR until one Saturday where you binge). Why? Well, first, because the show is fantastic -- the acting, the sharp dialogue, the commentary on current issues. But secondly, because the Cases of the Week and cavalcade of guest stars keep each episode fresh while the overarching stories give continuity and tension without delving into the melodramatic or silly. Perfection.