Another great episode. I was quite glad to see the writers break out of the "Billings is lazy, Dutch does something unorthodox, and Billings gets his act together in the clutch" mold. Instead, they worked together very nicely, even if they didn't close the case like Dutch wanted. That being said, I don't think we've seen the last of this kid because it felt fairly obvious they were setting up for bigger things. Plus, his mother was played by the absolutely wonderful Frances Fisher. More of her is always a good thing!
The scene with Cassidy and Danny was interesting and my respect for Danny increased with her insistence of not saying anything because it's not her place (nor did she "squeal" on Cassidy to Vic).