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A robbery at a local fish market sees the use of automatic weapons. There are several people either hurt or killed during the incident. Frank and Kevin must track down the source of these weapons, which have become increasingly used in crimes.

Frank and Kevin try to capture the gangsters that knocked off two men. Their biggest lead being some professional photographs taken during a wedding reception on a boat nearby where the murders took place.

Kevin and Frank pursue two criminals to a back alley. The two thugs try to escape, one manages to get away - the other gets shot by Frank when he appearently pulls out a gun. An investigation of the crime scene finds no trace of a gun, only a flashlight.

A woman on the way home is attacked and raped in her own house. Kevin and Frank quickly nab a suspect and are convinced that he is also responsible for six other rapes. Now they must prove his guilt. As a side story - two unrelated murders go unsolved.

Continuing from the previous episode, Kevin and Frank investigate a serial killer stalking females at night. A woman is scared in a park and runs to the police fearing she was the next victim. The suspect is questioned but released when they find no reason to hold him. After leaving the police station the woman is found murdered and the only witness is Whitey who may have taken a picture of the attacker. Kevin discusses theories on the killer with Tom and discovers some odd similarities with past attacks in other areas. Kevin consults with a national database operator regarding similiar crimes and is startled by his discovery...

Frank and his date (a fellow cop) discover a hold-up in progress at a variety store. They nab the suspect and discover that he is wanted for murder as well. While in the holding cell, the murderers friend, creates a hostage situation at Mid-South.

Mid-South is assigned to protect an ""Irish Terrorist"". They take him to a residental dwelling. Kevin has issues with his philosophies and the two argue. The man storms out of the living room and goes into the kitchen, where he is promptly shot thru a window.

Velvet, the lead singer of the punk rock band ""Crud"" is found dead of an appearent drug overdose. Frank and Kevin determine such is not the case and discover the cocaine was laced with cyanide.

A cleaning lady finds a man hanging over a doorway - it looks like an appearent suicide. Kevin suspects otherwise. His suspicions are confirmed when a second strange killing occurs. Shortly thereafter, the Feds become involved in the investigation

O'Brien and Giambone work the city's seamy nightlife assisted by Stevie who poses as a hooker to catch a murderous prostitute.

Giambone and O'Brien question overwhelming evidence against a man arrested for killing his father and sister.

O'Brien (Scott Hylands) is critically wounded while attempting to prevent a drug transaction. Guest stars: Clark Johnson, Tim Burd. With Jeff Wincott.

The detectives investigate a building owner who has been accused of arson even though he had no insurance and his son was a victim.

O'Brien and Giambone search for the loser at a big-money poker game who has gone on a rampage, killing several of the other players.

Kevin and Frank investigate the murders of elderly women at a senior citizen centre where the women were tricked into withdrawing their life savings prior to their deaths.

Kirkwood suspects that a death occurring during a shipping-plant strike is actually a carefully planned assassination.

O'Brien and Giambone's investigation of a killing depends on a mentally challenged teenager, the only witness to the crime.

Kirkwood and O'Brien (Allan Royal, Scott Hylands) investigate the murder of a celebrity's secretary. Guest star: Kate Trotter.

Two thieves break into a jewel/rare artifacts store and steal a miniature bird statue. The value of the statue is $1 million dollars.

Kirkwood (Allan Royal) feels responsible when a young reporter is killed while pursuing a story. Guest star: Barbara Bush. With Scott Hylands and Jeff Wincott.

Officials pressure Giambone and O'Brien to prove a troubled man caused the disappearance of two children.

Colby concludes his brother was the sole survivor of the massacre of five people during a diamond heist.

The longtime president of the cargo-handlers' union emerges as the prime suspect in his challenger's murder.