Joey finds Paul carrying a gun and questions him about it. Joe and Mary are having marital problems.

Joey risks everything to protect Paul. One hostage situation gets ugly when Mike is forced to kill a drug dealer while Joe ends another and no one is killed. Joe and Ginny get closer. Paul gets a job.

Joe is being blackmailed. Someone tells Mike about Joe and Ginny. Joey catches a murderer of a young Russian immigrant mother. Paul makes a delivery to a late night poker game. He stays to play, losing his job and winning $500 that his opponents cannot pay him. Mike wants to bring a foster kid he recently met, home, but Erin is against it. Erin feels like she doesn't want to be like Mary, so she decides she wants to go back to school. Mary talks to a priest.

Joey attempts to find an ear, bitten off during a barroom fight. Joey finds out that his girlfriend hasn't been faithful. Mike and Erin fight about Donny staying with them. Mary agrees to seeing a marriage counselor. Paul gets a job working for his girlfriend's father as a trader. Joe is still tormented by Keefer about his affair with Ginny.

Mike is shot in the line of duty and the Turks stand vigil as he goes through surgery.

Joe works to stay the execution of a death row inmate. Mike worries about Donny, while recuperating from surgery.

Mike works a case involving a girl murdered at an arcade. Joey and Teri try to work on their relationship. Joe and Mary see a counselor.

Mary is surprised to learn that she is pregnant. Keefer tells Mary about Joe's infidelity. Mike has nightmares about being injured.

Mike is forced to deal with his inner demons when he and Cliff are trapped inside a bank during an armed robbery. Mary confronts Joe about his affair.

Mary moves in with Mike and Erin. Keefer forces a confrontation with Joe when he take Ginny hostage. Paul cheats on Carolyn with her father's attorney.

Mary discovers that she is pregnant and despite the state of her marriage, she decides to keep the baby. Joey befriends an old man, Joe believes to be a murderer.

A dangerous situation emerges when Joey dates a nurse who works at an abortion clinic. Joe and Mary get ready for the baby. Someone blackmails Paul.