TV series
A tangled web of mystery. Classic 'whodunit' suspense.
Dr. Mark Sloan is a good-natured, offbeat physician who is called upon to solve murders.
Streaming, rental and purchase options
Checked Jul 22, 2026
Diagnosis: Murder is available to stream on Philo and Pluto TV in United States. Use the direct links below to open the provider.
Dr. Mark Sloan is a good-natured, offbeat physician who is called upon to solve murders.
Choose an episode, then use the watch options above for the show.
Episode 1
A comedy roast in Mark's honor is ruined by a double murder.
Directed by Christopher HiblerWritten by Mark SolomonGuest stars Ted Danson, Julia Duffy, Ruth Buzzi, Tom Poston, Steve Allen, Tim Conway, Norm Crosby, David Leisure
Episode 2
Mark worries that his sleepwalking brother may be guilty of murder.
Directed by Ron SatlofWritten by Chris AbbottGuest stars Daniel Hagen, Jeremy Garrett, Christopher Grove, John J. Dalesandro, Rob Leo Roy, Cheryl Francis Harrington, Victoria Fang, Mark Daniel Cade
Episode 3
Mark baby-sits Barbie, the daughter of one of Steve's old friends, while her father hides from a gangster.
Directed by Ron SatlofWritten by Steve BrownGuest stars Morgan Nagler, Don McManus, James Sutorius, Peter Hendrixson, Tom Kiesche, Jesse D. Goins, Robert Dorfman, Ernesto Miyares
Episode 4
A fiendish med student sells prescription pads to a drug dealer and murders his partner when she becomes too needy. Mark plays Columbo to nail the murderer.
Directed by Christopher HiblerWritten by Marc Cushman, Melody FoxGuest stars Jonathan Scarfe, Renée Humphrey, Mark Daniel Cade, Michael Caldwell, Charles Dougherty, Nicole Forester, Randall Slavin, Jonathan Avildsen
Episode 5
Steve investigates a murder in which the main suspect is the husband of Mark's old flame. Steve and Jesse date the same girl.
Directed by Christian I. Nyby IIWritten by Joel SteigerGuest stars Michelle Phillips, Ray Wise, Rebecca Staab, John Capodice, Israel Juarbe, Joanna Cassidy, Brent Keast, Charmin Lee
Episode 6
A med student, surrogate daughter to Madison Wesley, is sent to a rehab program to kick drugs. Once there, she's wrongly accused of murdering a fellow patient. Mark sets his sights on bringing down the real culprit.
Directed by Frank ThackeryWritten by Terry Curtis FoxGuest stars Lisa Sheridan, Lauren Dahl, Star Jasper, Herschel Bleefeld, Gerald Emerick, Susan Fukuda, Lisa Long, Marc Valera
Episode 7
Mark's life becomes hectic when a look-alike gangster moves to LA and is caught up in a struggle for power.
Directed by Victor LoblWritten by Terry Curtis FoxGuest stars Richard Cody, William Newman, Susan Gibney, David Marciano, Michelle Stafford, Aaron Meeks, George Hartmann, Kathleen Lloyd
Episode 8
Susan Gibney [ Maya ], David Marciano [ Eddie Michaels ], Michelle Stafford [ Trish ], Robert Bailey Jr. [ CJ ], Rusty Burns [ Betsy ], Richard Cody [ Kip ], George W. Hartmann [ Tommy ], William Newman [ Chester Chumley ], Kathleen Lloyd [ Emma Bornstein ], Kevin McNally [ Paramedic ], Aaron J. Meeks [ Dion ], John W. Johnston [ Rick ], Patricia Place [ Mrs. Palmer ], Daniel Zacapa [ Waiter ], Channon Roe [ Lucas (uncredited) ] rc: Med Student Alex Mark's life becomes hectic when a look-alike gangster moves to LA and is caught up in a struggle for power.
Directed by Victor LoblWritten by Terry Curtis FoxGuest stars Susan Gibney, David Marciano, Michelle Stafford, Rusty Burns, Aaron Meeks, George Hartmann, Kathleen Lloyd, Patricia Place
Episode 9
An outgoing radio host who's hunting for her birth mother is suspected of murdering a phony mother. Jesse's mother visits.
Directed by Terrence O'HaraWritten by Cathryn MichonGuest stars Kathleen Noone, Christine Tucci, Mark Adair-Rios, Alyson Croft, Catherine Paolone, Stephanie Miller, Donny Osmond, Marie Osmond
Episode 10
Mark matches wits with a beautiful jewel thief who's being framed for murder.
Directed by Christopher HiblerWritten by Steve Brown, Chris AbbottGuest stars Guy Siner, Paul Gleason, Stephanie Zimbalist, Philip Casnoff, Rebecca Chambers, Harry Bennett, Sue Casey, Jim Jansen
Episode 11
Hospital horticulturist Claude is revealed to be an escaped convict living under an assumed name for the past 10 years. Mark fights to shelter Claude from extradition while striving to prove his innocence.
Directed by Nancy MaloneWritten by Steve Brown, Burt PrelutskyGuest stars Scarlett Pomers, Leon Russom, Joanna Cassidy, Joyce Brothers, Michael Ryan Way, Marty Fortney, Evelyn Iocolano, Geoff Koch
Episode 12
Mark takes on a temporary assignment as physician on a cruise ship and sleuths to uncover the killer of a disagreeable man.
Directed by Frank ThackeryWritten by Michael Lyons, Kimberley WellsGuest stars Brynn Thayer, James Lancaster, Allison Mackie, John Bennett Perry, Nick Tate, Mia Wesley, Deena Dill, Lynne Marta
Episode 13
The whole gang, plus Alex Smith and Amanda's rascals, are invited to observe the shooting of an episode of "Frontier Dad", a family series about Wild West hero Dash, starring Carl Simpson.
Directed by Frank ThackeryWritten by Barry Van Dyke, Paul V. Picerni Jr.Guest stars Anne Lockhart, Paul Picerni, Jeff MacKay, Taryn Van Dyke, Carey van Dyke, Sal Viscuso, Wes Van Dyke, Robert Fuller
Episode 14
Mark investigates when a philandering chef is murdered during a televised charity cook-off.
Directed by Christopher HiblerWritten by Joyce BurdittGuest stars Alastair Duncan, Harriet Sansom Harris, Meagen Fay, Ken Kercheval, Debi A. Monahan, Julian Stone, Drew Ebersole, D'Wayne Gardner
Episode 15
Mark is stunned to learn that his late friend Jake was married to two women. Steve juggles the investigation of Jake's murder and a blossoming relationship.
Directed by Victor LoblWritten by Mark SolomonGuest stars Michelle Clunie, Molly Cheek, Delane Matthews, Cristine Rose, John Schuck, J.C. Wendel, Matthew Gottlieb, Anthony Newfield
Episode 16
A devious home security programmer plots to murder the children of everyone involved in the accidental death of his son.
Directed by Christopher HiblerWritten by Terry Curtis FoxGuest stars Rochelle Swanson, Jonathan Banks, Dan Lauria, Karmin Murcelo, Bethany Bassler, Richard Penn, Charmin Lee, Kevin McNally
Episode 17
A young med student is suspected of killing her abusive husband after her story of murderous burglars proves false.
Directed by Vincent McEveetyWritten by Joel SteigerGuest stars Joanna Cassidy, Brigid Brannagh, Robin Thomas, Granville Van Dusen, Mark Brown, Glenndon Chatman, Sean G. Griffin, Anthony S. Johnson
Episode 18
Steve meets a new girlfriend on a television game show and then investigates when she's killed. Steve suspects her estranged brother, a doctor at Community General.
Directed by Bernard L. KowalskiWritten by Cathryn MichonGuest stars Noah Blake, Kim Greist, Challen Cates, Downtown Julie Brown, William Morgan Sheppard, Tim Herzog, Barbara Mallory, Jeff Boland
Episode 19
Doc Sloan goes undercover as a patient in a retirement home to solve the murder of an ex-cop.
Directed by Farhad MannWritten by Burt Prelutsky, Charlie Schlatter, Craig TomashoffGuest stars Charlotte Rae, James Greene, Lee Weaver, Richard Cox, Mary Donnelly-Haskell, Julie Lauren, Thomas Bankowski, Peter Dennis
Episode 20
Steve teams with a Naval Investigator when the apparent suicide of a military officer turns into a cold-blooded murder.
Directed by Victor LoblWritten by Paul BishopGuest stars Mark Valley, Thomas Downey, Jenya Lano, J. Kenneth Campbell, Andi Carnick, Kimber Sissons, Shane van Dyke
Episode 21
Mark appears on a quiz show to uncover the killer of a game show contestant.
Directed by Nancy MaloneWritten by Terry Curtis FoxGuest stars Allyce Beasley, Jennifer Bini Taylor, John Griffin, Ken Lerner, Margaret Welsh, Mark Bennington, Roxana Brusso, Nika Futterman
Episode 22
Mark's old friend, singer Danielle Marsh, visits and begins exhibiting erratic behavior while dodging attempts on her life. Mark attempts to fight through Marsh's defensive barriers to help his friend.
Directed by Victor LoblWritten by Joel SteigerGuest stars Helen Reddy, David Bowe, Melissa Greenspan, David Graf, Gina Hecht, Jeff Bailey, Lawrence LeJohn, Anthony T. Pennello
Episode 23
An old friend of med student Alex Martin is mixed up in the murder investigation of an L.A. 'madam'. Mark suspects Alex's friend may be more deeply involved in the madam's business than she lets on. Meanwhile, Madison Wesley is stalked by a homicidal killer who's recently undergone plastic surgery.
Directed by Victor LoblWritten by Steve BrownGuest stars Priscilla Garita, John Schneider, Joanna Cassidy, Ari Meyers, John Thaddeus, Damon Jones, Anthony Michael Jones, Mike Justus
Episode 24
Madison moves in with her new paramour, unaware that he's trying to kill her. Jesse is suspected of being the anonymous author of a tell-all book that places hospital workers in spicy relationships.
Directed by Donald L. GoldWritten by Burt PrelutskyGuest stars Priscilla Garita, John Schneider, Joanna Cassidy, Sam Anderson, John Billingsley, Scotti Austin, Gregory Balaban, Kim Delgado
Episode information updated Jul 24, 2026
Dick Van DykeMark Sloan
Victoria RowellAmanda Bentley-Livingston
Charlie SchlatterJesse Travis
Scott BaioJack Stewart
Barry Van DykeSteve Sloan
Michael TucciNorman Briggs
Delores HallDelores Mitchell
Dan GilvezanKent Beaudine
CBSUnited States
Fred Silverman CompanyUnited States
Dean Hargrove ProductionsUnited States
Viacom ProductionsUnited StatesMore shows like Diagnosis: Murder.
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