"Loa Aloha" exposes a major problem with procedurals: there has to be a case. 99% of the time, even when there are great subplots going on, a procedural will still have some kind of investigation to frame the subplots, regardless of its quality.
In this particular episode, Danny finds himself unsure of what to do with his brother, a Wall Street scoundrel who is up to no good. Scott Caan does great work and Dane Cook isn't bad either. Unfortunately, the case of the week, an angry father killing those involved in his son's prosecution, seems beside the point. Sure, it emphasizes the importance of familial connection, but adds very little to the overall tension of the episode.
Score: 8.8/10