Bobby and Andy investigate the murder of a nurse. Suspects include an actor, a crazy man and eventually a uniform, Tommy Richardson, from the 15th precinct. During their investigation, Andy's doctor comes to the squad to see Andy, who won't return his calls. He wants to help Andy confront what's happening to him; however, Andy goes off him because he would rather not deal with the situation. Meanwhile, Greg and Jill look into the death of a bicycle messenger who was just trying to help a man whose backpack was stolen. They determine that the backpack contained drugs. When they get a suspect in custody who won't talk, Jill figures out a clever way to get an ID. At the end of the day, Andy and Bobby's investigation points toward Richardson.