Watch Marcus Welby, M.D. (1969) Season HD Full Free on solarmovie.do. Watch Marcus Welby, M.D. (1969) tv series online free. Dr. Marcus Welby, a general practitioner, and Steven Kiley, Welby's young assistant. The two try to ...Dr. 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 indifferent physicians.