YMMV / Marcus Welby, M.D.

• Harsher in Hindsight: Myra (Anne Baxter)'s reluctance to marry Marcus in The Pilot Movie Matter of Humanities is due to her not wanting to be widowed again... in real life Robert Young survived Anne Baxter.
• Hilarious in Hindsight: Presence of Universal TV regular Kathleen Lloyd (billed as Kathy Lloyd) as one of the high school students in "A Very Special Sailfish". She has no scenes with James Brolin perhaps wisely, as she'd go on to play his girlfriend in The Car - no wonder Kiley uses a motorbike...
• Retroactive Recognition: Richard Thomas, later of The Waltons, appears in "Echo of a Baby's Laugh" as a young expectant father.
• Values Dissonance: The attitudes expressed towards autism (treating it as a mental disorder) in "The Foal" and homosexuality in "The Other Martin Loring" and "The Outrage" definitely would not fly today. (The latter two were problematic even then... see their respective pages on The Other Wiki for details)