Mackey sets up Nick as a thief with a car-wash fronting operation as part of a scheme to expose the kingpin of a major car-theft ring.
Reporters Nick and Mackey investigate a movie queen with close ties to major sports figures who are involved in basketball point-shaving.
Undercover-hardhat Nick is framed for murder when he and Mackey investigate illegal building practices in the construction industry.
Mackey and Nick investigate when a singer suspects his recording company is bootlegging copies of his latest album; guest Wendy Schaal.
Nick, wounded in a gang shootout, sets out to report the truth about the hostility and drugs that breed violence in the barrio.
Mackey and Nick offer to help when an ex-safecracker who protected Mackey in prison is forced to rob one more bank or lose his daughter.
Nick and Mackey look into corrupt medical practices when a friend's father dies as a result of being transported to a distant hospital.
A major story develops when Nick and Mackey link an illegal-weapons dealer with a tough motorcycle gang involved in the cocaine trade.
Nick sets himself up as a potential victim for a video-dating service operating as a front for burglars who victimized Alice's mother.
Mackey's unexpected sighting of an old friend uncovers a plot to sell counterfeit designer products; guests Cotter Smith, Peter Coyote.
Mackey's concern for a model friend leads him and Nick to uncover an arson-for-profit ring in the fashion industry; guest Tia Carrere.
Nick goes under cover as a police officer after a friend of Mackey's, arrested for killing an officer, is found murdered in his cell.
Nick picks up the investigation after his mentor, a newspaperman, is killed before he could publish a story on high-level corruption.
The gangland execution of Nick's mentor puts the reporters on the trail of a politically ambitious district attorney with mob backing.