He guest-starred with Donna twice
William Windom (September 28, 1923 – August 16, 2012).
William Windom was an American actor. He played a wide variety of roles in both film and television during a nearly 60-year career, but is perhaps best known for his role as cartoonist John Monroe in the short-lived comedy My World and Welcome to It (1969–1970) winning him a Primetime Emmy Award, and his recurring role as Dr. Seth Hazlitt starring alongside Angela Lansbury in Murder, She Wrote (1984-1996).
Windom appears in two episodes of The Donna Reed Show: “All Is Forgiven” (Season 4, Episode 8) and “Wide Open Spaces” (Season 4, Episode 25).