This episode was a poignant one as it depicts the problems of returning veterans from Iraq. In this case, our hero is murdered by a group of drunken men, one of whom is a wealthy misery who feels he can do as he pleases and get away with it since his father is enormously wealthy.
The episode shows the effects of the murder on fellow marine Wahlberg, a tough police officer to begin with.
In a minor sidebar issue, the mayor tries to plant a story that Police Commissioner Frank Regan will challenge him for the mayoralty. The major story is so good that it just blows this segment away.