The statement of a drug dealer who survived a shoot-out that killed a cop leads Logan and Briscoe to suspect that the cop died because he was gay and his fellow officers were reluctant to back him up.

A scientist becomes the chief suspect when his estranged wife, who's been delaying divorce proceedings, is the victim of a letter bomb.

When Lt. Van Buren is the victim of an attempted holdup by two teens, she fires her gun and kills one of them, and the detectives are faced with the fact that she shot an unarmed child in the back.

Briscoe and Curtis try to solve a co-ed's murder after a graphic description appears online, while McCoy finds himself up against a lawyer who is reluctant to reveal elements of her client's past.

The murder of Richard Speigel, chief financial officer for an exclusive, family-owned department store goes from the sitting room to the bedroom and into the board room as suspicion shifts from co-workers to family members.

Taking on an apparent mafia murder, Detectives Briscoe and Curtis are stymied by a dead witness and a seemingly incoherent mob boss.

The owner of a clothing company with alien immigrant workers is found murdered which sends the detectives on a search for an unidentified evening caller whose girlfriend, also a worker in the factory, recently gave birth. Upon discovery that the victim was also the baby's father, the boyfriend is arrested with the motive being an office affair until the victim's widow discloses that it was a surrogate arrangement.