David Victor Creator, Executive Producer Robert Young Dr. Marcus Welby Actor James Brolin Dr. Steven Kiley Actor Elena Verdugo Consuelo Lopez Actor Anne Baxter Actor Sharon Gless Actor Anne Schedeen Actor Gavin Brendan Actor Marsha Hunt Mrs. Bellows Guest Star Linda Marsh Zoe Eugenides Guest Star Pamela Hensley Actor Lynn Carlin Helen Stewart Guest Star Alexander Scourby Lucas Coleman Guest Star Frank Webb Larry Bellows Guest Star Angela Greene Clair Clifford Guest Star Nora Marlowe Belle Newton Guest Star Rockne Tarkington Frank Davidson Guest Star Patti Heider Joyce Guest Star JoAnna Cameron Nurse Anne MacAndrews (as Jo Anna Cameron) Guest Star Miguel Ángel Landa Antonio Novarro Suarez Guest Star Amy Thompson Maggie Guest Star Ken Trevey Writer Robert Collins Writer Paul Schneider Writer Theodore Apstein Writer John W. Bloch Writer Jerome Ross Writer Max Hodge Writer John Erman Director Margaret Schneider Writer Don McDougall Director Steven Spielberg Director Leo Penn Director Gerry Day Writer Richard Benedict Director Philip Leacock Director Jeannot Szwarc Director Jane Mackenzie Writer Daniel Petrie Director