Diagnosis: Murder (season 4)

A friend of Steve's winds up dead in a friendly-fire incident involving a veteran cop, but the shooting may have been planned all along. Kim Johnston Ulrich played the conniving widow. Guest Star: Jonathan Banks. Note: Michael Tucci does not appear in this episode.

Sloan and Jesse make contact with a patient who died from a genetically altered strain of smallpox. Note: Michael Tucci does not appear in this episode.

After faking an attack on herself just to win endorsements, a skater kills her accomplice and frames her rival.

A string of murders occurs with the same killer signature. One of the victims supposedly called Mark, but it is after she was known to be dead. The case becomes personal when the killer starts calling Mark. Guest Stars: Kurt Fuller, and John Schneider.

Mark gets involved in the string of murders when the killer starts calling Mark. It gets more personal when the killer attacks Amanda. She manages to escape. Mark and Steve get closer to finding the killer. Guest Stars: Kurt Fuller, and John Schneider.

Sloan and Steve probe the murder of a private eye in the not-so-pretty world of modeling. Guest Star: Jessica Collins

A cardiologist and two business partners concoct a devious insurance scam. Guest Stars: Alan Rachins, Josh Taylor, and Stephen Lee.

A terrorist bombing leads to an undercover investigation involving an ambitious cop. Note: Michael Tucci does not appear in this episode.

Sloan discovers a murder victim amongst the trauma patients from a bus accident. Guest Star: Richard Riehle

The drug-addicted daughter of a senator is killed during an argument, but a senior aide tries to make it look like an overdose. Guest Star: Michael Cole, and John Rubinstein.

Sloan helps a lawyer probe a drive-by shooting at a high school. Guest Star: Piper Laurie. Note: Michael Tucci does not appear in this episode.

Sloan's daughter escapes the wrath of her abusive trucker husband who ends up dead. Guest Stars: Stacy Van Dyke (plays Carol Sloan Hilton), Anne Lockhart, and John Capodice.

Sloan looks for clues to solve the decades-old murder of his mentor. Guest Stars: Tricia O'Neil, Nicholas Pryor, and David Purdham.

Sloan enlists his friend Ben Matlock (Andy Griffith) to defend Jesse, who's accused of murdering a resident. Guest Star: Lee Chamberlin. Note: Michael Tucci does not appear in this episode.

With Jesse falsely accused of murdering Eric Spindler, Ben Matlock (Andy Griffith) gathers all the evidence to find the real killer. Guest Star: H. Richard Greene. Note: Michael Tucci does not appear in this episode.

Sloan assists Joe Mannix (Mike Connors) with an unsolved murder case from 1973.
Note: This episode serves as a sequel to the Mannix episode "Little Girl Lost". Guest Stars: Richard Gant, Julie Adams, Pernell Roberts, and Beverly Garland. Note: Michael Tucci does not appear in this episode.

The prime suspects in the murder of a country star are a driven TV producer and her timid songwriter daughter. Guest Stars: Deanne Bray, Barbara Mandrell, Billy Ray Cyrus, Terri Clark, Linda Davis, Billy Dean, Joe Diffie, Eddie Rabbitt, and Reba McEntire. Note: Michael Tucci does not appear in this episode.

A psychiatrist kills his estranged wife and tries to frame a patient. Guest Stars: Dwight Schultz. Note: Michael Tucci does not appear in this episode.

A sexy, but sinister, pharmaceutical rep has every intention of winning Sloan's heart.

A beach boy is suspected of killing his girlfriend's brother - a gang member. Guest Stars: Carey Van Dyke, and Shane Van Dyke. Note: Michael Tucci does not appear in this episode. Also, Wes Van Dyke might have been in this episode.

A surgeon drops dead while operating on another doctor. Guest Stars: Jack Klugman (plays Dr. Jeff Everden), Chad Everett, Wayne Rogers, Bernie Kopell

The pilot of an airliner escorting Sloan and Amanda to a medical conference in Europe is killed.

A wealthy woman, Claire Whitfield (Brynn Thayer) and her lover cook up an elaborate plot to bump off her husband, Elliott (Wayne Tippit). Brynn Thayer plays Leanne Macintyre On Matlock. Note: Charlie Schlatter and Michael Tucci do not appear in this episode.

A comedian stumbles in his attempts to murder his more successful partner, whose wife ends up dead. Guest Stars: Harvey Korman, Tim Conway (Plays Tim Conrad), and Tom Gallop (plays Phil Zarkin). Note: Michael Tucci does not appear in this episode.

A mad bomber whom Sloan helped put away breaks out of prison bent on revenge. Guest Stars: Carol Bruce, and Mary Kay Adams. Murderer: Sam Rosser