Good: 1.) The way Luther tore apart the detective and exposed him as an arrogant, singleminded, uncompromising individual who was willing to forge evidence to get what he wanted. 2.) Luther discrediting the kid without being a jerk. That kind of action is pretty difficult, and he did it well. 3.) The sympathetic defendent. 4.) The fact that they were willing to adress the fact that the father wasn't evil, but still at fault for neglecting his son. Few shows are willing to do this. The fact that the father refused to accept that it was his fault was also very well done.
Bad: 1.) The defendent calling the father was just stupid. 2.) The way they derailed the DA into an arrogant jerk. Other then that, it was good.