Dick Van Dyke stars as Dr. Mark Sloan, a physician who solves crimes with his son, Detective Steve Sloan (Barry Van Dyke), and medical intern Amanda Bentley (Victoria Rowell).
Main cast
- Dr. Mark SloanDick Van Dyke1–8Main
- Detective Steve SloanBarry Van Dyke1–8Main
- Dr. Amanda BentleyVictoria Rowell1–7; later recurringMain
- Dr. Jesse TravisCharlie Schlatter4–8Main
- Dr. Jack StewartScott Baio8Main
- Nurse Mildred KrebsMichael Tucci1–2; later supportingMain
- Carmen the ReceptionistCathy Lee1; later guestMain
Supporting cast
- Detective Lieutenant BurkeDennis Lipscomb1 (guest; named character in some episodes)Supp
- Officer Terry GibbsCynthia Gibb1 (guest; later recurring as different character)Supp
Guest & voice
- Various guest rolesMorgan FairchildmultipleGuest
- Herself / guest characterCarol Burnettone episodeGuest
No matches — try another name.
About this cast
Diagnosis: Murder is a long-running American medical crime drama starring Dick Van Dyke as Dr. Mark Sloan, a charming physician who aids his son, a police detective, in solving murders. The series blends medical mystery with procedural investigation and often features lighthearted moments.
FAQs
Who plays Dr. Mark Sloan in Diagnosis: Murder?
Dick Van Dyke plays Dr. Mark Sloan, the central character and amateur sleuth.
Is Diagnosis: Murder based on a true story?
No, it is a fictional series created by Joyce Burditt, though it was spun off from a character introduced on the series ‘Father Dowling Mysteries’.
How many seasons of Diagnosis: Murder are there?
Eight seasons aired from 1993 to 2001, with a total of 178 episodes.
Where was Diagnosis: Murder filmed?
Primarily in Los Angeles, California, with many episodes set at the fictional Community General Hospital.
Does Barry Van Dyke actually play Dick Van Dyke’s son in real life?
Yes, Barry Van Dyke is Dick Van Dyke’s real-life son, adding a layer of authenticity to their on-screen father-son relationship.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026