7.9/1098 votes#1 - Murder by Friendly Fire
Season 4 Episode 1 - Aired 9/19/1996
One police officer is accidentally shot by another during a raid gone wrong. Dr. Sloan investigates the victim's wife, the shooter, and a conniving lawyer when he suspects foul play.
Director: Christian I. Nyby II
Writer: Gillian Horvath
- 8.0/1094 votes
#2 - Murder Can Be Contagious
Season 4 Episode 2 - Aired 9/26/1996
A burglar inadvertently becomes infected with a deadly virus. Dr. Sloan and Jesse are subsequently exposed to the virus after Jesse stumbles upon the thief's dead body. Both Mark and Jesse are confined to Mark's home while Steve and Amanda investigate the drug company that manufactured the virus, in the hopes of discovering an antidote before Jesse runs out of time.
Director: Vincent McEveety
Writer: William Rabkin, Lee Goldberg
- 7.4/10107 votes
#3 - Murder on Thin Ice
Season 4 Episode 3 - Aired 10/3/1996
A figure skater hires her ex-coach to attack a rival skater. Dr. Sloan tries to prove her guilt.
Director: Christopher Hibler
Writer: Robin Madden
- 7.7/10104 votes
#4 - X Marks the Murder (1)
Season 4 Episode 4 - Aired 10/10/1996
Mark, Steve, et al, investigate a string of the so-called ""Casanova"" murders. Dr. Sloan loses his detached perspective when the killer begins calling Mark.
Director: Christian I. Nyby II
Writer: Lindsay Harrison
- 7.4/1092 votes
#5 - X Marks the Murder (2)
Season 4 Episode 5 - Aired 10/10/1996
Mark, Steve, et al, investigate a string of the so-called ""Casanova"" murders. Dr. Sloan loses his detached perspective when the killer begins calling Mark.
Director: Christian I. Nyby II
Writer: Lindsay Harrison
- 7.2/1090 votes
#6 - A Model Murder
Season 4 Episode 6 - Aired 10/17/1996
Dr. Sloan investigates a photographer, the overly protective mother of Jesse's friend's fiancée, in the murder of a private investigator.
Director: Vincent McEveety
Writer: Sam Egan
- 7.8/1081 votes
#7 - Murder Can Be Murder
Season 4 Episode 7 - Aired 10/24/1996
A respected cardiologist murders an innocent man in an insurance scam. Dr. Sloan reluctantly investigates his friend.
Director: Christian I. Nyby II
Writer: Tom Chehak
- 6.8/10106 votes
#8 - An Explosive Murder
Season 4 Episode 8 - Aired 10/31/1996
A young undercover detective investigates a militia-type organization to solve a terrorist bombing witnessed by Mark. She has to decide whether to risk blowing her cover and warn Dr. Sloan of an attempt on his life or finish her assignment.
Director: Steve Miner
Writer: Dean Hargrove
- 7.8/1096 votes
#9 - Murder by the Busload
Season 4 Episode 9 - Aired 11/7/1996
A bus accident brings multiple victims into the hospital. Amanda does the bulk of the investigating when its discovered that a casualty in the accident was actually murdered.
Director: Christian I. Nyby II
Writer: William Rabkin, Lee Goldberg
- 7.2/1084 votes
#10 - A Candidate for Murder
Season 4 Episode 10 - Aired 11/14/1996
His scheming advisor covers up the accidental death of the drug-addicted daughter of a U.S. Senator. Dr. Sloan and Amanda investigate.
Director: Christopher Hibler
Writer: Steve Hattman
- 6.9/1096 votes
#11 - The ABC's of Murder
Season 4 Episode 11 - Aired 11/21/1996
An ADA sets out on a vendetta against an Asian youth, against both Mark and Steve's advice, after a drive-by shooting at a high school leaves one teacher dead.
Director: Christian I. Nyby II
Writer: Steve Hattman
- 7.8/10100 votes
#12 - Murder in the Family
Season 4 Episode 12 - Aired 12/12/1996
Mark's daughter returns after eight years, leaving an abusive husband who later turns up dead.
Director: Vincent McEveety
Writer: Lindsay Harrison
- 7.8/1098 votes
#13 - In Defense of Murder
Season 4 Episode 13 - Aired 1/9/1997
When a famous prostitute writes a tell-all book, an executive's job at Community General is in serious jeopardy.
Director: Vincent McEveety
Writer: Gerry Conway, Joyce Burditt
- 8.0/1091 votes
#14 - A History of Murder
Season 4 Episode 14 - Aired 1/16/1997
Mark investigates a 30-year old murder when the body of his old mentor is discovered entombed in a wall in the hospital.
Director: Christian I. Nyby II
Writer: Gerry Conway
- 7.4/10123 votes
#15 - Murder Two (1)
Season 4 Episode 15 - Aired 1/30/1997
Jesse is arrested and charged with murder after a doctor testifying against Jesse in a malpractice suit is poisoned. Mark convinces his old friend, Ben Matlock, to defend Jesse.
Director: Christopher Hibler
Writer: Joel Steiger, Gerald Sanoff
- 7.8/10109 votes
#16 - Murder Two (2)
Season 4 Episode 16 - Aired 2/6/1997
Amanda and Ben investigate the murder of Eric Spindler while Jesse continues to languish in jail.
Director: Christopher Hibler
Writer: Joel Steiger, Gerald Sanoff
- 8.1/10168 votes
#17 - Hard-Boiled Murder
Season 4 Episode 17 - Aired 2/13/1997
Mark aids an old friend, Joe Mannix, in solving a 25-year-old, unsolved murder.
Director: Christian I. Nyby II
Writer: William Rabkin, Lee Goldberg
- 7.2/10102 votes
#18 - Murder, Country Style
Season 4 Episode 18 - Aired 2/20/1997
When a musician is found murdered at a Country Music Awards ceremony, Dr. Sloan and company rush to find the culprit before the show ends and the crowd disappears.
Director: Christopher Hibler
Writer: Gerry Conway
- 7.9/1099 votes
#19 - Delusions of Murder
Season 4 Episode 19 - Aired 2/27/1997
A devious psychologist uses hypnotism to facilitate his criminal acts, including the murder of his wife.
Director: Christopher Hibler
Writer: Michael Berlin, Eric Estrin
- 7.7/1091 votes
#20 - A Passion for Murder
Season 4 Episode 20 - Aired 4/3/1997
An aggressive female pharmaceuticals representative stalks the hospital's new chief of staff after a one-night-stand, hoping to break up his marriage and have him all for herself.
Director: Christian I. Nyby II
Writer: William Rabkin, Lee Goldberg
- 6.6/1094 votes
#21 - Blood Brothers Murder
Season 4 Episode 21 - Aired 4/10/1997
A beach boy involved with a gang member's sister is suspected of murdering him. Mark investigates.
Director: Christian I. Nyby II
Writer: Barry Van Dyke, Jeff Glasser
- 8.1/10122 votes
#22 - Physician, Murder Thyself
Season 4 Episode 22 - Aired 4/24/1997
Dr. Sloan investigates when an unpopular colleague drops dead while performing an operation. Mark investigates his fellow doctors when tests reveal the deceased was poisoned.
Director: Christian I. Nyby II
Writer: Gerry Conway
- 8.2/1091 votes
#23 - Murder in the Air
Season 4 Episode 23 - Aired 4/24/1997
Dr. Sloan and Amanda investigate when the co-pilot of the airplance carrying them to a medical conference is murdered and the remainder of the flight crew are incapacitated with a mysterious illness.
Director: Tom Chehak
Writer: Tom Chehak
- 8.0/10101 votes
#24 - The Merry Widow Murder
Season 4 Episode 24 - Aired 5/1/1997
A wealthy woman and her boyfriend dupe Mark and plot to murder her husband.
Director: Oz Scott
Writer: Joyce Burditt
- 7.3/10116 votes
#25 - Comedy is Murder
Season 4 Episode 25 - Aired 5/8/1997
A bungling comedian seeks revenge on his former partner when he's cheated out of millions.
Director: Christopher Hibler
Writer: William Rabkin, Lee Goldberg
The Best Episodes of Diagnosis: Murder Season 4
Every episode of Diagnosis: Murder Season 4 ranked from best to worst. Discover the Best Episodes of Diagnosis: Murder Season 4!
Dr. Mark Sloan is a good-natured, offbeat physician who is called upon to solve murders.
Genres:DramaFamily
Network:CBS
Season 4 Ratings Summary
"Murder by Friendly Fire" is the best rated episode of "Diagnosis: Murder" season 4. It scored 7.9/10 based on 98 votes. Directed by Christian I. Nyby II and written by Gillian Horvath, it aired on 9/19/1996. This episode is rated 0.1 points higher than the second-best, "Murder Can Be Contagious".