Season 4

01 Silk Episode 114th January 1988 A young woman leads O'Brien and Giambone (Scott Hylands, Jeff Wincott) to a hit man who plans to assassinate the deputy mayor. 02 Chinatown Episode 221st January 1988 Giambone and O'Brien are assigned to investigate several murders after Kirkwood's friend gets involved with the Chinese underworld. 03 Ain't No Cure for Love Episode 34th February 1988 When a junkie who attempts to rob the bar is killed by an irate patron, Nicole hides the real facts from O'Brien. 04 Woof Episode 411th February 1988 Vociferous animal rights activists raid a research laboratory and steal monkeys to use in a propaganda campaign. 05 Whitey's Run Episode 518th February 1988 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. 06 Blowing Bubbles Episode 625th February 1988 O'Brien (Scott Hylands) must re-evaluate his relationship with Nicole (Susan Hogan) when she becomes pregnant. Guest star: Elias Zarou. In addition, O'Brien and Giambone investigate a gruesome assault tied to a crooked restaurant owner who is indebted to a dying loanshark. With Jeff Wincott. 07 None Shall Sleep Episode 721st April 1988 When Lt. Hogan is shot during a holdup, O'Brien and Giambone must rally behind the unfamiliar lead of a beautiful temporary commander to catch the assailants. 08 Forgive Me Father Episode 828th April 1988 A young woman confesses to Father Torres that she witnessed her brother kill a friend over a disagreement during a mugging. 09 Better Part of Valor Episode 95th May 1988 Carson (Stephen Mendel) feels responsible when Colby (Eugene A. Clark) is shot while investigating a robbery. With Scott Hylands and Jeff Wincott. 10 The Privilege of Freedom Episode 1012th May 1988 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. 11 Set for Life Episode 1119th May 1988 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. 12 Bogota Blues Episode 1222nd September 1988 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. 13 Bless Me Father Episode 1329th September 1988 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. 14 The Mercenary Episode 146th October 1988 Kevin and Frank investigate when a real estate fraud sends a psychopath on a killing spree. 15 False Witness Episode 1513th October 1988 A man attempts to protect his wife after she witnesses the murder of a drug dealer. 16 Archie's Riff Episode 1620th October 1988 O'Brien and Giambone (Scott Hylands, Jeff Wincott) investigate when members of a jazz band are killed one by one. Guest stars: Paul Benjamin, James Purcell. 17 Goodbodies Episode 1727th October 1988 O'Brien and Giambone investigate the murder of a health club co-owner and confront a powerful loan shark. 18 Ice Episode 183rd November 1988 After a jewelry robbery goes awry and an injury inhibits O'Brien, the prime suspect fabricates charges against Giambone. 19 Jumper Episode 1910th November 1988 O'Brien is consumed with guilt when he fails to prevent a suicide; Giambone pursues murderous thieves. 20 The Professional Episode 2017th November 1988 O'Brien and Giambone (Scott Hylands, Jeff Wincott) must prevent the assassination of an Italian organized crime prosecutor (Hrant Alianak). 21 The Wrong Woman Episode 2124th November 1988 A police academy classmate of Giambone (Jeff Wincott) is investigated by a review board. Guest stars: Frank Pellegrino, Barbara Barnes-Hopkins. With Scott Hylands. 22 No Regrets Episode 221st December 1988 O'Brien and Giambone (Scott Hylands, Jeff Wincott) become involved when Nicole's (Susan Hogan) mother (Frances Hyland) is attacked by a group of skinheads. 23 Elaine Episode 2329th December 1988 Elaine (Deborah Grover) reluctantly becomes a decoy for a serial killer. With Scott Hylands and Jeff Wincott. 24 Blues in a Bottle Episode 245th January 1989 The officers of Mid-South are reminiscing about their time together. After working together for years they now face the possibility of being sent to different precincts. Kirkwood proposes a feature article to raise awareness and prevent the closure.