Diagnosis: Murder

The cast, 1993–1995: Victoria Rowell, Michael Tucci, Barry Van Dyke, Scott Baio, and Delores Hall, with Dick Van Dyke in the center

• Dr. Mark Sloan (played by Dick Van Dyke), Former army doctor and Chief of Internal Medicine at Community General Hospital, and protagonist of the series. Son of a police officer and father of another, in whose cases he often gets involved. He is a medical consultant to the LAPD. Dick Van Dyke was considered for the lead role after the positive reviews he received from his dramatic role in the 1990 movie Dick Tracy (although the character he played in the movie was villain and very different from the role of Mark Sloan). In the pilot, the character had interests in tap dance and clarinet playing; however, these were considered distracting and were toned down and eventually removed from the character as the series developed.
• Lieutenant Detective Steve Sloan (played by Barry Van Dyke), a detective sergeant (later lieutenant from season 2 onward) in the Robbery/Homicide Division of the LAPD and Dr. Mark Sloan's son. After an earthquake destroyed his apartment, he lived in a separate apartment in his father's beach house in Malibu, California. Steve often uses his "patented" dive to apprehend criminals.[2]
• Dr. Amanda Bentley (played by Cynthia Gibb in the TV movies set before the series), later Bentley-Livingston (played there by Victoria Rowell), resident Pathology at Community General Hospital and assistant County Medical Examiner, who is also Dr. Mark Sloan's double act and medical partner, involving in each of Mark's & Steve's cases, after the accident. As a favorable character of the show, she also dated Jack and was later Jesse's best friend. During the series, she married a military man named Colin Livingston, and they had one son named C.J. She named her only biological child Colin Jesse Livingston after his father and Dr. Jesse Travis, who delivered the baby alone in the back of his beloved VW convertible, with Mark assisting over cell phone. Her husband was overseas at the time and unfortunately unreachable. Depending on the episode, she later divorced her husband or he was killed in an airplane crash. Later in the series, she adopted another boy, Deon.
• Dr. Jack Stewart (played by Stephen Caffrey in the TV movies, Scott Baio in the series from 1993 to 1995, seasons 1–2), a doctor at Community General Hospital and Steve's best friend, whom he often helped in his cases. He left to open his own family medicine in Colorado. Jack Stewart does reappear in a couple of Lee Goldberg's Diagnosis Murder books, "The Silent Partner" and "The Last Word". In the first three TV Movies his name was Jack Parker.
• Dr. Jesse Travis (played by Charlie Schlatter, 1995–2001, seasons 3–8), a residency and handsome student at Community General Hospital who Mark took under his wing and who became best friends with Amanda. He later went into business with Steve as partners in a barbecue restaurant. Another favorable/list of breakout characters of the series, he often got involved in Mark and Steve's cases, with good intentions but not always good results. In the crossover double episode "Murder Two", he himself became the prime suspect of a rival doctor's killing, hence he badgered Mark to call his old friend Ben Matlock (played by Dick's real-life best friend Andy Griffith) for help. The hospital staff thought he wrote the tell-all book "Big City Hospital" as Dr. Anonymous but later found out it was written by someone else. Jason Tucker was a character in the book who sounded exactly like Jesse, which is why the hospital staff thought it was him.
• Norman Briggs (played by Michael Tucci, 1993–1997, seasons 1–4), business administration at Community General Hospital and a close friend of Dr. Mark Sloan, even though he is often exasperated by him.
• Delores Mitchell (played by Delores Hall, 1993–1995, seasons 1–2), Dr. Sloan's lively secretary.

One unique aspect of the series was that it frequently appropriated characters from various classic television series, or featured veteran actors playing characters inspired by or similar to their classic roles.

• Rob Petrie (played by Van Dyke himself in The Dick Van Dyke Show) features in a cameo in the episode "Obsession, Part 2" where Dr. Sloan is in a radio station, and walks past a studio where (through use of CGI), Rob is trying his hand at radio Disc jockey. The footage of Rob as a DJ is taken from the Dick Van Dyke Show episode "One Hundred Terrible Hours". This scene moves Diagnosis: Murder into the realm of fantasy as Petrie is shown in black and white (with Sloan visible in a color insert behind him), after which Sloan breaks the fourth wall and looks at the audience before the story continues.
• Mike Connors reprised his titular character of Mannix in the season 4 episode "Hard-Boiled Murder." The episode's story was a sequel to the Mannix episode "Little Girl Lost."
• Andy Griffith reprised his titular role of Ben Matlock from Dean Hargrove's Matlock series in Season 4 two-parter "Murder Two" (1997). In a sense, this brought Diagnosis: Murder full circle, as its parent series, Jake and the Fatman, was inspired by a Season 1 episode of Matlock in 1986.
• Barbara Bain reprised her role of Cinnamon Carter of Mission: Impossible in season 5 episode "Discards."
• Peter Graves, who starred alongside Barbara Bain on Mission: Impossible as Jim Phelps did not return as his character, but did make a very brief cameo in "Must Kill TV" and the same scene is seen in part 1 of the Series 6 episode Trash TV Part 1 as "Dr. Sloane" [sic] in a Mission: Impossible-style illusion of his first TV pilot of "Doctor Danger," later replaced during the show.
• Robert Culp also guest starred in the episode "Discards" as Dane Travis, a retired espionage, tennis professional, and Dr. Travis' father. The character was similar to his Kelly Robinson character from I Spy, though Travis was said to have worked with the Impossible Missions Force (also seen on Mission: Impossible).
• "Discards" also featured appearances by former TV spies Patrick Macnee (The Avengers), Robert Vaughn (The Man from U.N.C.L.E.) and Phil Morris (the 1988 version of Mission: Impossible), though they did not play their original characters.
• Jack Klugman also guest starred in season 4 episode "Physician, Murder Thyself," as a character very similar to his famous role on Quincy, M.E.. He guest-starred again, in season 6 episode "Voices Carry" as police detective Harry Trumble, the former fiance of Dr. Mark Sloan's late wife. Trumble reappeared in Lee Goldberg's Diagnosis Murder novel "The Past Tense."
• George Takei, Walter Koenig, Majel Barrett, Wil Wheaton, and Grace Lee Whitney (all from Star Trek or Star Trek: The Next Generation), as well as Bill Mumy (from Lost in Space), were guest stars in "Alienated!" one sixth season episode, which involved an apparent extraterrestrial life alien abduction and coverup.
• The episode "Drill for Death" included appearances by several actors associated with the M*A*S*H franchise: Elliott Gould and Sally Kellerman from the original movie; Jamie Farr, Loretta Swit and William Christopher from the television series; and Christopher Norris from the sequel series Trapper John, M.D..
• Randolph Mantooth and Robert Fuller, who worked together on NBC's Emergency! appeared together in a 1997 episode about the Malibu, California brushfires.
• The episode "Must Kill TV" features a number of small cameos by television personalities such as Erik Estrada and Dr. Joyce Brothers playing themselves and a larger one from Stephen J. Cannell as an over-the-top producer of action TV. The role is reprised in the two-parter "Trash TV."
• The episode "Food Fight" (1998) features Erin Moran, Pat Morita, Don Most, David Lander, Leslie Easterbrook and Conrad Janis. All of these actors starred alongside Scott Baio in Happy Days or its spin-offs, Laverne & Shirley, Joanie Loves Chachi and Mork & Mindy.
• The episode "Promises to Keep" (1998) features characters introduced in the Promised Land (a spin-off of Touched by an Angel) episode "Total Security" (1998) crossover into the show.
• A somewhat special case is the appearance of Jennifer Ringley (the internet's first web-based lifecaster with her pioneering JenniCam website from 1996 to 2003) in the 1998's episode "Rear Windows '98", where she played a fictionalized version of herself (with a website called "Joannecam") who is killed in the first minute.

Over the run of the show, various episodes guest starred at least eight different members of the Van Dyke family:

• Dick Van Dyke and son Barry Van Dyke in the lead roles.
• Dick's brother, Jerry Van Dyke.
• One of Dick's daughters, Stacy Van Dyke.
• Barry's children: Carey Van Dyke, Shane Van Dyke, Wes Van Dyke and Taryn Van Dyke.

• Joanna Cassidy (Season 7) plays Madison Wesley, a doctor friend of Mark Sloan, and Dean of Community General's Medical School. She is in 8 episodes.
• Kim Little (Seasons 5 and 6) plays Susan Hillard, Jesse's longtime girlfriend, for 10 episodes. In the season 7 episode "Bringing Up Barbie" It is mentioned that she left Jesse to go to Oregon with a male Chiropractor. But in the Diagnosis Murder books which take place after Season 6, she appears in almost every book and Jesse and Susan get Married in the book "The Dead Letter".
• Susan Gibney (Seasons 5–7) plays Detective Tanis Archer, Steve's partner in 4 episodes. Susan Gibney was also in three other episodes as two different characters.
• Charmin Lee (Seasons 7–8) is Steve's second partner Detective Cheryl Brooks, who is in 11 episodes between seasons 7 and 8.
• Martin Kove (Seasons 6–7) is Captain Newman, for 3 episodes.
• Shane Van Dyke (Seasons 4–8) is Alex Smith, a third year medical school, who appears in 14 episodes during seasons 7 and 8. He is also seen as a boxing student in Never Say Die and an actor in Frontier Dad. (Both these episodes star the rest of Barry Van Dyke's children also.)
• Carey Van Dyke (Seasons 4–8) plays various characters: Mr. Kelso, Terry Marshall, Kyle Lewis, Brendan Kelly, Carl Simpson, and Craig Wilson. In the TV movie "A Town without Pity he plays a character named "Billy".
• Kevin McNally II (Seasons 3–8) as the ubiquitous Emergency Medicial Technician in 19 episodes.
• Tim Conway plays Tim Conrad, an old friend of Mark's and a comedian, in 2 episodes. Conway and Van Dyke had previously worked together on The Carol Burnett Show.
• Harry Lennix (Seasons 5–6) plays FBI Agent Ron Wagner and Amanda's love interest in 6 episodes.
• Fred Dryer (Season 5) plays Police Chief Masters in 3 episodes.
• Nancy Youngblut (seasons 4–5) plays Nurse Nancy Rush in 2 episodes.
• Mariette Hartley (1st and 2nd TV movies only) plays Kate Hamilton the Administrator at Community General Hospital.
• Vernee Watson-Johnson (1st and 2nd TV movies only) plays Esther Wiggins Dr. Mark Sloan's Secretary.
• Kimberly Quinn (episode "Dance of Danger" and the TV movie "Without Warning") plays Ellen Sharp, a tabloid news reporter who Steve Sloan is interested in. Steve proposes to her in the TV Movie "Without Warning" and she says yes.
• Robert Bailey Jr. (Season 7) plays Colin Jesse, or C.J. for short, Amanda Bentley's son. He was born in Season Three of the show and is played by Robert Bailey Jr. in three of the episodes he appeared in. C.J. appeared in a few more episodes before Season 7 as a different child actor.
• Aaron Meeks (Season 7) plays Deon a boy who Dr. Amanda Bentley adopts. He appears in 3 episodes.

The first season’s filming commenced in July 1993 in Denver, Colorado. Much of the cast as well as the production company personnel from Viacom stayed in the (then) Embassy Suites Hotel in downtown, located at 19th Street between Curtis and Arapahoe. Among the reasons that production of Diagnosis: Murder was located in Denver was because the same production people had already been working there since about 1990 filming the new Perry Mason made for TV movies.

At that same time, Raymond Burr and his associates were busily filming their episodes for Perry Mason. In and around the Embassy Suites Hotel at that time, it was not unusual to see several semi-trailers parked street-side in support of the production at various office or exterior locations in and around downtown Denver.

Both series were produced by the Hargrove, Silverman team with Viacom. Therefore, the business decision to combine both productions at the same location was evident. While the Perry Mason series was often filmed in a special courtroom constructed for the production within The Denver City and County Building, Diagnosis: Murder was temporarily set at the then recently closed St. Luke’s Hospital on 19th Street just east of downtown.

When Raymond Burr became terminally ill later that summer, he no longer was seen at the hotel after having filmed his last episode, The Case of the Killer Kiss. (1993) In fact, upon his demise, Paul Sorvino was seen entering the hotel building to begin filming what was to be the last Perry Mason episode ever filmed in Denver, – A Perry Mason Mystery: The Case of the Wicked Wives (1993). Upon completion of that filming, Viacom and the entire production company left Denver in late September, early October 1993, including that of Diagnosis: Murder. Thus, only the Diagnosis: Murder episodes filmed from mid-July through September 1993 were shot in Denver, after which production shifted permanently to Los Angeles.

Community General Hospital is the main set for the show. It is six to seven floors depending on the episode. It holds about 400 beds, with three trauma rooms, two psych wards, and one Intensive Care Unit. Dr. Mark Sloan is Chief of Internal Medicine. The Marriott Hotels & Resorts in Woodland Hills, Los Angeles, was used as the exterior of Community General Hospital in the final three seasons of the show.

List of Administrators at Community General Hospital

1. Russell Havilland (was The Administrator at Clairemont Hospital in the Pilot of Diagnosis: Murder, "It Never Entered My Mind". He was murdered and Dr. Mark Sloan was framed for his murder.)
2. Kate Hamilton (was The Administrator at Community General Hospital in The 1st and 2nd Diagnosis: Murder TV Movies. It was said in the Diagnosis: Murder book "The Shooting Script" that Kate Hamilton decided to sell her home and use the proceeds to open a nonprofit food bank in the inner city.)
3. Norman Briggs (was The Administrator of Community General Hospital for the first 4 seasons of Diagnosis: Murder. According to the book "The Shooting Script" it sounds like Norman was fired by the new owners Healthcorp International.)
4. Harold Lomax (he appeared in a few episodes like "Do No Harm" and "Today is The Last Day of the Rest of My Life". In the book "The Shooting Script" When Community General Hospital was sold to Healthcorp International they brought in General Harold Lomax who'd spent ten years running battlefield medical operations for the U.S. Marine Corps. Harold Lomax later resigned with an Extreme case of Irritable Bowel syndrome and left behind a hospital literally in ruins, decimated by a serial bomber "Catlin Sweeney" who was stalking Mark for putting her brother "Carter Sweeney" in prison.)
5. Noah Dent (he appeared in the books "The Shooting Script" and "The Last Word". He ended up being hired by the new owners of the hospital "Hollywood International" and had a personal vendetta against Mark Sloan for Catching "Tanya" who murdered a rapist who raped her and killed a homeless War Veteran who saw her kill him. He ended up firing Mark, Amanda, and Jesse's girlfriend Susan. Jesse ended up finding out and blackmailed him into giving everyone back their jobs. He ended up leaving Community General Hospital.)
6. Janet Dorcott (she appeared in the book "The Last Word". She ended up firing Jesse and Susan Travis, after being framed for Murder and Amanda Bentley was also fired for selling body parts from dead bodies and fired Mark because she blamed him for all the scandal around Community General Hospital.)

BBQ Bob's is a restaurant that Jesse Travis and Steve Sloan co-own starting in the sixth season. Mark Sloan is also a silent partner. It is located in a small strip mall very close to Community General Hospital. Other stores around it include a jewelry store, travel agency and a bank. It is often frequented by the hospital staff as an alternative to the hospital cafeteria. All staff members get discounts. The exterior of BBQ Bob's was based on a storefront at the Whizin's Center in Agoura, California, where exterior scenes of BBQ Bob's were occasionally filmed.

In the first two seasons of the show Mark Sloan lived in a house in Denver, Colorado. No explanation is given when the show shifts to California for all the remaining episodes.

Starting in the third season, Mark and Steve Sloan live in a beach house at 3231 Beach Drive, Malibu, with Steve in the basement. The basement was often redressed to act as other sets. The actual house is on Broad Beach Road in Malibu, California. The house was later used as a filming location for the Disney Channel show Hannah Montana.

The pilot episode was called "It Never Entered My Mind" from Jake and The Fatman. Mark Sloan was a widower with no sons. The hospital is called Clairemont Hospital instead of Community General Hospital, and there is no Jack or Amanda. His friends who helped him clear his name are

1. Richard (Steven Eckholdt)
2. Josie (Ally Walker)
3. Thad (Kristoff St. John)

Diagnosis: Murder had five TV movies between 1992 and 2002, three of which aired prior to the TV series.

• Diagnosis of Murder, the first TV movie was filmed in July 1991 and aired before the regular series, January 5, 1992, on CBS.
• The House on Sycamore Street, the second TV movie, aired before the regular series, May 1, 1992, on CBS.
• A Twist of the Knife, the third TV movie, aired before the regular series, February 13, 1993, on CBS.
• A Town Without Pity, the fourth TV movie, aired after the end of the regular series, February 6, 2002, on CBS.
• Without Warning, the fifth and final TV movie, aired after the end of the regular series, April 26, 2002, on CBS.

1. Sister Michael Wants You – Delta Burke starred as Sister Michael, a crime solving nun.[3]

1. How to Murder Your Lawyer – Mitchell Whitfield and Leah Remini starred as crime solving lawyers Arnold Baskin and Agnes Benedetto.
2. Georgia on My Mind – A possible backdoor pilot about a female private investigator, Georgia (Daphne Ashbrook).

1. An Explosive Murder – Starred Tracey Gold as undercover officer Amy Dawson.

1. A Mime is a Terrible Thing to Waste – An unsold backdoor pilot for an untitled series. Rachel York played Randy Wolfe who's apparently an expert at everything.
2. Retribution Parts One and Two – "Retribution" was a backdoor pilot for a spinoff called The Chief that would have starred Fred Dryer as Police Chief Masters.

1. Blood Ties – Starred two vice unit detectives, Detective Amy Devlin (Kathy Evison) and Detective Taylor Lucas (Zoe McLellan). It was a backdoor pilot for a TV series that would have been named Whistlers.

Two of the characters in The Death Merchant later reappeared in Lee Goldberg's series of novels based on the television series Monk:

• Lt. Ben Keoloha appears in Mr. Monk Goes to Hawaii as the Kauai police lieutenant that Adrian Monk and Natalie Teeger assist in solving several unsolved cases on the island.

• Diagnosis: Murder (1992 TV movie) at IMDb
• Diagnosis: Murder (1975 movie) at IMDb
• The House on Sycamore Street (1992) at IMDb
• A Twist of the Knife (1993) at IMDb