Trapper John, M.D. focuses on the life and career of Dr. "Trapper" John McIntyre, 28 years after his discharge from the 4077th Mobile Army Surgical Hospital (M.A.S.H. or MASH) in the Korean War. The series had Trapper working as chief of surgery at the San Francisco Memorial Hospital.
One of the other characters in the show was Doctor George Alonzo "Gonzo" Gates, who was played by Gregory Harrison. Gonzo was a man who had just returned to the states after serving in a Vietnam-era MASH unit, and who was much like what Trapper had been earlier.
In this series, Trapper has mellowed somewhat, and had become more a part of medical establishment than what he had been in his younger days. Eventually his son J.T., played by Timothy Busfield, joins him at the hospital. While the show had a comedy element, it also dealt with serious subjects, such as AIDS - which had appeared in the developed world during the series run.
Legally, the show is considered a spinoff of the original movie MASH, rather than the M*A*S*H television show. This is due to a court case in which the producers of the series had sought royalty payments on the grounds that Trapper John, M.D. was a spinoff of their television series. However, the court found that the series was a spinoff of the original movie. As a result, the series producers did not receive any royalties from Trapper John, M.D.
- Pernell Roberts as Dr. "Trapper" John McIntyre, M.D.
- Gregory Harrison as Dr. George Alonzo "Gonzo" Gates, M.D.
- Charles Siebert as Dr. Stanley Riverside II, M.D.
- Brian Stokes Mitchell as r. Justin "Jackpot" Jackson, M.D.
- Christopher Norris as Nurse Gloria "Ripples" Brancusi (1979–1985)
- Mary McCarty as Nurse Clara "Starch" Willoughby (1979–1980)
- Simon Scott as Arnold Slocum, Hosp. Administrator
- Jessica Walter as Melanie McIntyre
- Madge Sinclair as Nurse Ernestine Shoop (1980–1986)
- Timothy Busfield as Dr. John "J.T." McIntyre, Jr., M.D. (1984–1986)
- Lorna Luft as Nurse Libby Kegler (1985–1986)
- Kip Gelman as Dr. Jacob Christmas (1986)
|Seasons||Episodes||Originally aired||Nielsen ratings|
|First aired||Last aired||Rank||Rating||Tied with|
|1||22||September 23, 1979||March 30, 1980||19||21.2||N/A|
|2||18||November 23, 1980||May 17, 1981||17||20.7||Fantasy Island|
|3||25||October 4, 1981||May 16, 1982||15||21.1||Hart to Hart|
|4||22||September 26, 1982||April 3, 1983||18||18.7||Gloria|
|5||22||October 2, 1983||May 6, 1984||30||17.0||N/A|
|6||23||September 30, 1984||May 5, 1985||29||16.8||N/A|
|7||19||October 6, 1985||September 4, 1986||N/A||N/A||N/A|