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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!

Binge this in 18h 45m•Peaking at 8.3/10

Dr. Mark Sloan is a good-natured, offbeat physician who is called upon to solve murders.

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Episode Rankings

  1. #1 Fan Favorite
    Diagnosis: Murder Season 4 Episode 23 - Murder in the Air
    8.3/10(115 votes)

    S4:E23

    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

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  2. Diagnosis: Murder Season 4 Episode 17 - Hard-Boiled Murder
    8.2/10(199 votes)

    S4:E17

    Mark aids an old friend, Joe Mannix, in solving a 25-year-old, unsolved murder.

    Director:Christian I. Nyby II
    Writers:William Rabkin, Lee Goldberg

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  3. Diagnosis: Murder Season 4 Episode 22 - Physician, Murder Thyself
    8.2/10(145 votes)

    S4:E22

    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:Unknown

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  4. Diagnosis: Murder Season 4 Episode 2 - Murder Can Be Contagious
    8.1/10(111 votes)

    S4:E2

    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
    Writers:William Rabkin, Lee Goldberg

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  5. Diagnosis: Murder Season 4 Episode 14 - A History of Murder
    8.1/10(111 votes)

    S4:E14

    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

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  6. Diagnosis: Murder Season 4 Episode 26 - The Murder of Mark Sloan
    8.1/10(116 votes)

    S4:E26

    Dr. Sloan is stalked by a mad bomber whom he helped incarcerate. Norman and Mark are the main dissenters in negotiations to sell the hospital to a corporate raider.

    Director:Christopher Hibler
    Writer:Steve Hattman

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  7. Diagnosis: Murder Season 4 Episode 9 - Murder by the Busload
    8.0/10(118 votes)

    S4:E9

    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
    Writers:William Rabkin, Lee Goldberg

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  8. Diagnosis: Murder Season 4 Episode 19 - Delusions of Murder
    8.0/10(119 votes)

    S4:E19

    A devious psychologist uses hypnotism to facilitate his criminal acts, including the murder of his wife.

    Director:Christopher Hibler
    Writers:Eric Estrin, Michael Berlin

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  9. Diagnosis: Murder Season 4 Episode 1 - Murder by Friendly Fire
    7.9/10(115 votes)

    S4:E1

    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

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  10. Diagnosis: Murder Season 4 Episode 7 - Murder Can Be Murder
    7.9/10(98 votes)

    S4:E7

    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

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  11. Diagnosis: Murder Season 4 Episode 16 - Murder Two (2)
    7.9/10(135 votes)

    S4:E16

    Amanda and Ben investigate the murder of Eric Spindler while Jesse continues to languish in jail.

    Director:Christopher Hibler
    Writers:Joel Steiger, Gerald Sanoff

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  12. Diagnosis: Murder Season 4 Episode 13 - In Defense of Murder
    7.8/10(116 votes)

    S4:E13

    When a famous prostitute writes a tell-all book, an executive's job at Community General is in serious jeopardy.

    Director:Vincent McEveety
    Writers:Gerry Conway, Joyce Burditt

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  13. Diagnosis: Murder Season 4 Episode 20 - A Passion for Murder
    7.8/10(111 votes)

    S4:E20

    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
    Writers:William Rabkin, Lee Goldberg

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  14. Diagnosis: Murder Season 4 Episode 24 - The Merry Widow Murder
    7.8/10(126 votes)

    S4:E24

    A wealthy woman and her boyfriend dupe Mark and plot to murder her husband.

    Director:Oz Scott
    Writer:Joyce Burditt

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  15. Diagnosis: Murder Season 4 Episode 15 - Murder Two (1)
    7.7/10(148 votes)

    S4:E15

    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
    Writers:Joel Steiger, Gerald Sanoff

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  16. Diagnosis: Murder Season 4 Episode 4 - X Marks the Murder (1)
    7.6/10(125 votes)

    S4:E4

    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

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  17. Diagnosis: Murder Season 4 Episode 5 - X Marks the Murder (2)
    7.6/10(112 votes)

    S4:E5

    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

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  18. Diagnosis: Murder Season 4 Episode 10 - A Candidate for Murder
    7.5/10(105 votes)

    S4:E10

    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

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  19. Diagnosis: Murder Season 4 Episode 12 - Murder in the Family
    7.5/10(129 votes)

    S4:E12

    Mark's daughter returns after eight years, leaving an abusive husband who later turns up dead.

    Director:Vincent McEveety
    Writer:Lindsay Harrison

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  20. Diagnosis: Murder Season 4 Episode 25 - Comedy is Murder
    7.5/10(143 votes)

    S4:E25

    A bungling comedian seeks revenge on his former partner when he's cheated out of millions.

    Director:Christopher Hibler
    Writer:Unknown

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  21. Diagnosis: Murder Season 4 Episode 3 - Murder on Thin Ice
    7.3/10(129 votes)

    S4:E3

    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

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  22. Diagnosis: Murder Season 4 Episode 6 - A Model Murder
    7.3/10(115 votes)

    S4:E6

    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

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  23. Diagnosis: Murder Season 4 Episode 18 - Murder, Country Style
    7.2/10(122 votes)

    S4:E18

    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

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  24. Diagnosis: Murder Season 4 Episode 11 - The ABC's of Murder
    7.1/10(116 votes)

    S4:E11

    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

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  25. Diagnosis: Murder Season 4 Episode 21 - Blood Brothers Murder
    6.7/10(114 votes)

    S4:E21

    A beach boy involved with a gang member's sister is suspected of murdering him. Mark investigates.

    Director:Christian I. Nyby II
    Writers:Barry Van Dyke, Jeff Glasser

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Season 4 Ratings Summary

"Murder in the Air" is the best rated episode of "Diagnosis: Murder" season 4. It scored 8.3/10 based on 115 votes. Directed by Tom Chehak and written by Tom Chehak, it aired on 4/24/1997. This episode is rated 0.1 points higher than the second-best, "Hard-Boiled Murder".