Marcus Welby, M.D. - an American medical television series, aired on ABC from September 23, 1969, to July 29, 1976. Main stars were Robert Young (Dr. Marcus Welby) and James Brolin (Dr. Steven Kiley). The show tells the story of the doctors Marcus Welby, a general practitioner and Steven Kiley, Welby's young assistant. The two try to treat people as individuals in an age of specialized medicine and uncaring doctors. We watched it weekly.