St. John investigates an old crime when the long missing body finally turns up, along with evidence that the police framed the man convicted of the crime.

When the heir to a Greek-American fortune is murdered, his estranged younger brother becomes the prime suspect.

St. John looks for a killer and jewel thief inside a posh Los Angeles hotel.

The suspects in an actress's murder—a failed director, a faded star, a clerk, and a priest—are placed under police surveillance.

John tracks down a murdered barber/bookie's two sets of client to find who killed him.

A woman is shot by a sniper during a party at a marina apartment complex, leading St. John and Wade to a dark side of ""swinging singles.""

A criminologist whose speciality was the rehabilitation of parolees is killed and his research assistant assaulted, leaving St. John to piece through the man's work to find a suspect.

St. John searches for a serial killer dubbed ""The Executioner"" and rages when Sam's reporter ex-girlfriend reveals information about the case on television.

John and Sam argue when a strange teenager claims to have witnessed a murder; while St. John dismisses her as an emotionally disturbed attention-seeker, Sam believes she's genuine.

In the wake of a bank robber's return to Los Angeles, St. John investigates the murder of a witness to the man's crimes and tries to protect the remaining witnesses.

A murder leads St. John to another case when he discovers a link between a woman killed by plastic explosives planted in her car and an electronics firm.

St. John investigates the murder of a Texan who'd recently moved to Los Angeles and finds a world of cheating wives, greedy art dealers, and opportunistic gigolos.

John goes undercover in a sanitarium to investigate reports of elderly patients being bilked and murdered.

St. John enlists a local sheriff to help hunt down a woman suspected of murdering an small-town real estate promoter found dead in a Los Angeles motel.