Watch Series: Marcus Welby, M.D. Released in (1969) - Season 4 produced by USA, The TV Series categorized in Drama, and content rating 1h with duration 60 min broadcasted as these networks ABC, ABC (US), Streamed at Putlocker & directed by David Victor, Marc Daniels, Leo Penn, Hollingsworth Morse. Marcus Welby, M.D. is an American medical drama television program that aired on ABC from September 23, 1969, to July 29, 1976. It starred Robert Young as a family practitioner with a kind bedside manner and James Brolin as the younger doctor he often worked with, and was produced by David Victor and David J. O'Connell. The pilot, A Matter of Humanities, had aired as an ABC Movie of the Week on March 26, 1969. - Season 4