I knew this show had a few crossovers. I didn't realize just how many.
- Green Hornet
- South Park
October 1973--NEW SCOOBY-DOO MOVIES--"Scooby-Doo Meets Dick Van Dyke"--Apparently, there was a plan to reuse footage from this episode as a dream sequence where Doctor Sloan meets Scooby-Doo. That would imply that the Dick Van Dyke seen in this episode isn't the actor, but is instead Doctor Sloan.
March 1991--JAKE AND THE FATMAN--"It Never Entered My Mind"--Diagnosis Murder is a spin-off of Jake and the Fatman.
1992--DIAGNOSIS MURDER--Police detective Steve Sloan believes that top manager Nick Osborn has killed his boss, trust-owner Russell Cord. His father, senior hospital doctor Mark Sloan, is convinced that his long-time patient Osborn is innocent and soon discovers three other top employees of the Cord Group who also had reasons for killing their boss. Pretending to be a medical police consultant, Dr Sloan starts investigating the case himself, supported by a junior doctor and a young female pathologist. Besides, the merry old doctor saves the life of a young street urchin and takes tap-dance lessons from an old patient.
1992--THE HOUSE ON SYCAMORE STREET--Dr Mark Sloan cannot believe that his former student Dr Drummond, an ambitious cosmetic surgeon, has committed suicide. Assisted by his team of hobby detectives, pathologist Amanda Bentley and junior doctor Jack Parker, Sloan tries to investigate the case. He finds out that Drummond and his senior partner, Dr Stern, had used plastic surgery to create a double of rich banker and benefactor Gantry, who is expected to make a major donation to the community hospital. Does Gantry also plan to have his double assassinated in order to vanish with the money himself?
1993--A TWIST OF THE KNIFE--Dr Sloan suspects that his flame of long ago, famous heart surgeon Dr Rachel Walters, has murdered US Senator Cabot on the occasion of a guest operation at the community hospital. After a long investigation, Sloan and fellow detectives Dr Bentley and Dr Parker discover her motive: Years ago, Cabot had caused a hit-and-run accident that put her daughter into coma. But how did Dr Walters manage to pass the deadly bacteria on to the senator in front of TV cameras?
1993 to 2002--DIAGNOSIS MURDER--Apparently, there was an episode featuring Dr. Sloan's extended family, all of whom were also played by Dick Van Dyke. Because of this, we might presume that every role ever played by Dick Van Dyke is a relative of Dr. Sloan!!! And here's a list of all of his roles.
November 1994--DIAGNOSIS MURDER--"Georgia on My Mind"--Apparently the Maltese Falcon appears, though probably not the real one.
1996 to 1999--PROMISED LAND--Episodes of these two shows share a guest character.
January 1997--DIAGNOSIS MURDER--"Murder Two"--Andy Griffith reprises his Matlock role on Diagnosis Murder.
February 1997--DIAGNOSIS MURDER--"Hard-Boiled Murder"--Pj LozitoOn , Mike Connors reprised the role of Mannix on an episode entitled “Hard-Boiled Murder,” which was a sequel to the MANNIX episode “Little Girl Lost.” Before that, Connors guest-starred on an episode of HERE’S LUCY entitled “Lucy and Mannix are Held Hostage.”
October 1997--DIAGNOSIS MURDER--"Malibu Fire"--a fire truck with the number 51 can be seen in a scene with Randy Mantooth and Robert Fuller (from EMERGENCY!).
November 1997--DIAGNOSIS MURDER--"Discards"--Cinnamon Carter appears. Click here for Thomas Holbrook's take on this crossover. Robert Culp also guest starred in the episode "Discards" as Dane Travis, a retired spy, 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).
May 1998--DIAGNOSIS MURDER--"Obsession"--I'm going to go with Toby's explanation for this one. "During the May Sweeps of that year, CBS celebrated its 50th anniversary on Television. (I'm sure the actual anniversary for the whole corporation, including radio, would have been a higher figure.) As part of the salute, certain CBS shows, both the dramas and the sitcoms, had moments in which cameos from the archives were blended into the present day narrative.alking through the hallways of a major communications building, Dr. Mark Sloan looked into an engineering booth and saw Rob Petrie spinning records for a radio station. Dr. Sloan was in color outside the booth's window. Everything inside the booth was in black & white. Rob Petrie was also looking as young as he did more than thirty years before (even longer, considering that particular episode was a flashback to before his tenure on 'The Alan Brady Show'.) It was also a scene that, unlike most of the others used in this project, didn't lend itself to being repeated dialogue. It was the type of scene that should have played itself out that one times back in the late 1950s and that's it. So I'm thinking it had to be something caused by some paranormal activity, perhaps a continuation of the radio transmission experiment carried out in 'The Galaxy Being', the first episode of 'The Outer Limits'. But this time, instead of beaming an alien from its homeworld to Earth, the holographic image of Rob Petrie was trasmitted across the country. (This could also have been achieved by some kind of meteorological phenomenon.) And then there's always the more realistic splainin - poor old Dr. Sloan was hallucinating, perhaps the first sign of dementia in his old age."
2002--DIAGNOSIS MURDER: TOWN WITHOUT PITY--Dr. Mark Sloan and his son Steve go to the desert to learn the fate of Mark's daughter and her new husband.
2002--DIAGNOSIS MURDER: WITHOUT WARNING--Dr. Mark Sloan (Dick Van Dyke) reprises his role as the crime solving doctor in this tv movie based on the television series. When a large group of Mexican workers are infected with a deadly virus, Dr. Sloan and his friends must figure out the cause and cure for it before it's too late.
February 2004--DIAGNOSIS MURDER--"The Death Merchant"--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.
- Ian Ludlow appears in Mr. Monk and the Two Assistants as the private consultant for the Los Angeles Police Department. In the course of that novel, Ludlow frames several people such as Natalie, Monk's first assistant Sharona Fleming, and Sharona's ex-husband Trevor Howe, for a series of bizarre murders. But later on Monk proves that Ludlow committed all the crimes himself.
May 2007--LOST--"Through the Looking Glass"--Toby has found us another connection between Lost and Diagnosis Murder which you can read here.
November 2010--BIG BANG THEORY--"The 21-Second Excitation"--From James Bojaciuk: Another Big Bang Theory crossover. In "The 21-Second Excitation," Sheldon and the gang break into a movie theater to steal a limited edition cut of Raiders of the Lost Ark. One of the posters advertises Tuttle Meets the Mummy. In an episode of Diagnosis Murder, Adam West played Tuttle, one half of the television crime fighting duo Tuttle and the Mummy. It gets weirder. In the classic Stooge short "We Want Our Mummy," the boys were dispatched to find the missing Professor Tuttle (and, along the way, the lost King Rutentuten). Perhaps Rutentuten and the Professors descendants were active crimefighters, much like the Batmen and their Robins. It is a tale lost to the sands of time.
Final Notes: There was some crossovery stuff that just wasn't able to work as canon. Check out the TVCU Facebook forum for more.