Marcus Welby, M.D., “A Matter of Humanities”; Season 1, Episode 1). Role: Lew Sawyer. ABC. Airdate: 9/23/69. An accomplished older doctor is forced by poor health to bring in a younger partner. The disparity between them shaped the basis for the popular series that followed. Peter plays a teacher whose wife can no longer cope with his aphasia and ability to verbalize only one word: Mother.