# Trapper John, M.D.
**Trapper John, M.D.** is an American television medical drama that aired on CBS from September 23, 1979, to September 4, 1986, and centers on Dr. "Trapper" John McIntyre ([Pernell Roberts](https://www.edgepedia.org/pernell-roberts)) 28 years after his discharge from the 4077th Mobile Army Surgical Hospital in the [Korean War](https://www.edgepedia.org/korean-war), now Chief of Surgery at San Francisco Memorial Hospital.[1](https://interviews.televisionacademy.com/shows/trapper-john-m-d) It is a spin-off of the 1970 film *MASH*, and its legal relationship to the *M\*A\*S\*H* television series became the subject of a royalty lawsuit.[1](https://interviews.televisionacademy.com/shows/trapper-john-m-d) • [2](https://www.worthpoint.com/dictionary/p/entertainment/-medical/trapper-john-m-d-television-series)
| Key fact | Detail |
|---|---|
| Run | CBS, September 23, 1979 – September 4, 1986; pilot plus 151 episodes of 60 minutes in color across 7 seasons[1](https://interviews.televisionacademy.com/shows/trapper-john-m-d) • [3](https://ctva.biz/US/Medical/TrapperJohnMD.htm) |
| Premise | Trapper John McIntyre, 28 years after Korea, as Chief of Surgery at San Francisco Memorial Hospital[1](https://interviews.televisionacademy.com/shows/trapper-john-m-d) |
| Co-lead | Gregory Harrison as Dr. George Alonzo "Gonzo" Gates, a Vietnam War MASH veteran, in 142 episodes[1](https://interviews.televisionacademy.com/shows/trapper-john-m-d) • [4](https://www.imdb.com/title/tt0078704/fullcredits/) |
| Production | Twentieth Century-Fox Television; Frank Glicksman and Don Brinkley production for CBS, Sundays 10:00 pm[3](https://ctva.biz/US/Medical/TrapperJohnMD.htm) |
| Legal basis | Framed as deriving from the 1970 film and Richard Hooker's novel; *M\*A\*S\*H* producers' royalty suit was successfully defended[2](https://www.worthpoint.com/dictionary/p/entertainment/-medical/trapper-john-m-d-television-series) |
| Theme music | Composed by John Parker[3](https://ctva.biz/US/Medical/TrapperJohnMD.htm) |
## Origins and the rights dispute
The series occupies an unusual position in television law. It continues a character from *M\*A\*S\*H*, but the producers framed it as based on the character in the novel *M\*A\*S\*H* by W. C. Heinz and Richard Hornberger and on the 1970 motion picture.[3](https://ctva.biz/US/Medical/TrapperJohnMD.htm) The producers of the *M\*A\*S\*H* television series filed suit arguing that they were entitled to royalties because *Trapper John, M.D.* was based on the character portrayed by [Wayne Rogers](https://www.edgepedia.org/wayne-rogers); the *Trapper John* producers successfully argued that the character was based on the earlier film and the novel by [Richard Hooker](https://www.edgepedia.org/richard-hooker).[2](https://www.worthpoint.com/dictionary/p/entertainment/-medical/trapper-john-m-d-television-series)
Credit for creating the series is also reported differently. The Television Academy credits the writer-producer Don Brinkley, who died July 14, 2012, in [Sag Harbor, New York](https://www.edgepedia.org/sag-harbor-new-york), at age 91, as having "created the popular CBS series *Trapper John, M.D.*"[5](https://www.televisionacademy.com/features/news/news/don-brinkley-writer-producer-and-creator-trapper-john-md) Richard Hooker, the novelist, is also credited with creating *Trapper John, M.D.* as a spin-off from the television show *M\*A\*S\*H*.[2](https://www.worthpoint.com/dictionary/p/entertainment/-medical/trapper-john-m-d-television-series)
## Premise and setting
The show moved the character from a Korean War field hospital to present-day San Francisco. Trapper John is mellowed into a mentor and father figure at San Francisco Memorial Hospital, where he is Chief of Surgery.[1](https://interviews.televisionacademy.com/shows/trapper-john-m-d) According to one retrospective ranking, he is depicted as a doctor grown into maturity who, though now part of the establishment, continues at times to skirt rules and procedures in order to help his patients.[6](https://collider.com/tv-medical-dramas-ranked/)
The mentor dynamic is built around a younger mirror of the title character. Dr. George Alonzo "Gonzo" Gates ([Gregory Harrison](https://www.edgepedia.org/gregory-harrison)) had served in a MASH unit during the [Vietnam War](https://www.edgepedia.org/vietnam-war), lived in a motor home in the hospital parking lot, and shared Trapper's sense of humor and love of life, reflecting elements of Trapper's younger days.[1](https://interviews.televisionacademy.com/shows/trapper-john-m-d)
## Cast and characters
**Pernell Roberts** played Dr. John McIntyre, credited by IMDb in all 151 episodes (1979–1986).[3](https://ctva.biz/US/Medical/TrapperJohnMD.htm) • [4](https://www.imdb.com/title/tt0078704/fullcredits/) **Gregory Harrison** played Gonzo Gates in 142 episodes.[4](https://www.imdb.com/title/tt0078704/fullcredits/) In a casting coincidence, Harrison had appeared in a 1976 episode of *M\*A\*S\*H* as Lt. Tony Baker, the husband of one of the nurses at the 4077th.[1](https://interviews.televisionacademy.com/shows/trapper-john-m-d)
The supporting ensemble, with tenures as recorded in the classic-television archive and the reference work:[3](https://ctva.biz/US/Medical/TrapperJohnMD.htm) • [2](https://www.worthpoint.com/dictionary/p/entertainment/-medical/trapper-john-m-d-television-series)
- Charles Siebert as Dr. Stanley Riverside II (1979–1986)
- [Brian Stokes Mitchell](https://www.edgepedia.org/brian-stokes-mitchell) as Dr. Justin "Jackpot" Jackson, credited by IMDb in 151 episodes[4](https://www.imdb.com/title/tt0078704/fullcredits/)
- Christopher Norris as Gloria "Ripples" Brancusi, R.N. (1979–1985; 150 episodes per IMDb)[3](https://ctva.biz/US/Medical/TrapperJohnMD.htm) • [4](https://www.imdb.com/title/tt0078704/fullcredits/)
- [Madge Sinclair](https://www.edgepedia.org/madge-sinclair) as Nurse Ernestine Shoop (1980–1986, seasons 2–7)[3](https://ctva.biz/US/Medical/TrapperJohnMD.htm) • [2](https://www.worthpoint.com/dictionary/p/entertainment/-medical/trapper-john-m-d-television-series)
- Mary McCarty as Nurse "Starch" Willoughby (1979–1980)[3](https://ctva.biz/US/Medical/TrapperJohnMD.htm)
- Simon Scott as Arnold Slocum[2](https://www.worthpoint.com/dictionary/p/entertainment/-medical/trapper-john-m-d-television-series)
- [Timothy Busfield](https://www.edgepedia.org/timothy-busfield) as Dr. John "J.T." McIntyre (1984–1986, season 7)[3](https://ctva.biz/US/Medical/TrapperJohnMD.htm) • [2](https://www.worthpoint.com/dictionary/p/entertainment/-medical/trapper-john-m-d-television-series)
- Lorna Luft and Andrea Marcovicci (1985–1986)[3](https://ctva.biz/US/Medical/TrapperJohnMD.htm)
**Late-series changes.** Harrison left the show midway through season seven; his character was subsequently retired from medicine after suffering a stroke, and Kip Gilman replaced him as Dr. Jacob Christmas.[2](https://www.worthpoint.com/dictionary/p/entertainment/-medical/trapper-john-m-d-television-series)
## Production and broadcast history
The series was a Twentieth Century-Fox Television production by Frank Glicksman and Don Brinkley for CBS, scheduled Sundays at 10:00 pm.[3](https://ctva.biz/US/Medical/TrapperJohnMD.htm) Production companies included Frank Glicksman Productions (1979–1984), Don Brinkley Productions, and 20th Century Fox Television.[2](https://www.worthpoint.com/dictionary/p/entertainment/-medical/trapper-john-m-d-television-series) Don Brinkley produced seasons 1 through 5; Deborah Zoe Dawson and Victoria Johns produced seasons 6 and 7.[3](https://ctva.biz/US/Medical/TrapperJohnMD.htm) The theme music was by John Parker.[3](https://ctva.biz/US/Medical/TrapperJohnMD.htm)
The full run comprised a pilot plus 151 episodes of 60 minutes in color across seven seasons, 1979 to 1986.[3](https://ctva.biz/US/Medical/TrapperJohnMD.htm)
## Reception and legacy
In a retrospective ranking of 30 television medical dramas, Collider placed *Trapper John, M.D.* 29th, noting that it ran for seven successful seasons and is often overlooked because it aired at the same time as the other medical drama *M\*A\*S\*H*.[6](https://collider.com/tv-medical-dramas-ranked/) The same ranking highlights the show's portrayal of Trapper as a matured man of medicine who still bends rules for his patients.[6](https://collider.com/tv-medical-dramas-ranked/)
The series carried a war-comedy character into a contemporary hospital setting as a spin-off of the 1970 film *MASH*.[1](https://interviews.televisionacademy.com/shows/trapper-john-m-d) • [6](https://collider.com/tv-medical-dramas-ranked/)
## References
1. [Trapper John, M. D. | Television Academy Interviews](https://interviews.televisionacademy.com/shows/trapper-john-m-d)
2. [Trapper John, M.D., Television Series – WorthPoint reference entry](https://www.worthpoint.com/dictionary/p/entertainment/-medical/trapper-john-m-d-television-series)
3. [CTVA US Medical Drama – "Trapper John MD" (TCF/CBS) (1979–86)](https://ctva.biz/US/Medical/TrapperJohnMD.htm)
4. [Trapper John, M.D. (TV Series 1979–1986) – Full cast & crew – IMDb](https://www.imdb.com/title/tt0078704/fullcredits/)
5. [Don Brinkley, Writer-Producer and Creator of Trapper John, M.D., Television Academy](https://www.televisionacademy.com/features/news/news/don-brinkley-writer-producer-and-creator-trapper-john-md)
6. [30 Best TV Medical Dramas, Ranked – Collider](https://collider.com/tv-medical-dramas-ranked/)
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*Topic: Encyclopedia › Arts and culture › Screen and stage › Film and television › Series and fictional screen worlds › Scripted television and comedy series › Genre and subject-scripted series › Medical drama series*
*Initially written Sep 17, 2026 · Reviewed: Sep 30, 2026; Oct 25, 2026 · Edited: Oct 15, 2026; Oct 25, 2026 · Last review: Oct 25, 2026*
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License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license