Trapper John, M.D. is an American television medical drama and spin-off of the film MASH, concerning a lovable surgeon who became a mentor and father figure in San Francisco, California. The show ran on CBS from September 23, 1979, to September 4, 1986.
Trapper John, M.D. focuses on Dr. "Trapper" John McIntyre (Pernell Roberts) 28 years after his discharge from the 4077th Mobile Army Surgical Hospital (M.A.S.H.) in the Korean War. In the nearly three decade interim, the character had mellowed considerably. He didn't just learn how to stop fighting the system but became a part of it, in a sense, as the Chief of Surgery at San Francisco Memorial Hospital. Trapper showed tremendous compassion towards his patients, often violating "established hospital procedures." Working with Trapper was an aspiring young professional named Dr. George Alonzo "Gonzo" Gates (Gregory Harrison). Gates had a lot in common with Trapper, as he had served in a M.A.S.H. during the Vietnam War. His sense of humor and love of life also reflected elements of Trapper's younger days. In the show, Gonzo resided in a motor home in the hospital parking lot. Interestingly, Harrison was featured in a 1976 episode of the television series, M*A*S*H, as Lt. Tony Baker, the husband of one of the nurses at the 4077th.