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.
Continuing from the previous episode, 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.
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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
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.
Two thieves break into a jewel/rare artifacts store and steal a miniature bird statue. The value of the statue is $1 million dollars.
A lounge singer is seen arguing with his cousin over money. The cousin is later found murdered. Does the lounge singer have ties to the mafia?
Whitey and his girlfriend become mob targets after he witnesses a murder during his pickup of stolen merchandise. Whitey and his girlfriend are forced to enter the witness protection program.
O'brien must re-evaluate his relationship with Nicole when she becomes pregnant. In addition, O'brien and Giambone investigate a gruesome assault tied to a crooked restaurant owner who is indebted to a dying loanshark.
O'brien and Giambone search for the criminals who shot Lt. Hogan during a holdup.
A young woman confesses to Father Torres that she witnessed her brother kill a friend over a disagreement during a mugging.
Carson feels responsible when Colby is shot while investigating a robbery.
O'brien and Giambone investigate the deaths of six illegal aliens who died in a shipping container trying to enter the country. Both are convinced another 'shipment' is on the way.
While investigating an unusual death, Kevin and Frank become curious about a wealthy family's effort to keep their dead father's memory alive. Frank is pursued by payroll because of his mounting debt.
A Columbian detective helps the precinct apprehend members of a drug ring when several people are killed by a lone gunman during a cocaine operation.
A priest helps the police find the hit-and-run driver who killed a young woman. Meanwhile, a women visits Lt. Hogan and claims to be his daughter.
Kevin and Frank investigate when a real estate fraud sends a psychopath on a killing spree.
A man attempts to protect his wife after she witnesses the murder of a drug dealer.
The officers of Mid-South reminisce about their past experiences when the precinct is about to be shut down forcing the officers who had worked together for years to be scattered to other precincts.