Marcus Welby, M.D. - Season 5 Episode 4 Blood Kin
Overview: Rico and Louisa Renati, aware their frail but lively daughter Maria has the rare Cooley's Anemia, peculiar to Italians, refuse Dr. Welby's suggestion on the operation. Dr. Jed Hartnet, a leading specialist in this type of disease who is ready to quit the profession , becomes intrigued with Maria and decides to fight her parents' decision.