Trapper John, M.D. is an American medical drama television series and spin-off of the film M*A*S*H (1970). Pernell Roberts portrayed the title character, a lovable surgeon who became a mentor and father figure in San Francisco, California. The show ran on CBS for seven seasons, from September 23, 1979, to September 4, 1986. Roberts played the character more than twice as long as had Wayne Rogers (1972–75) on the TV series M*A*S*H. The role of Trapper John was played by Elliott Gould in the film.