To Kill a Mockingbird (film) was William Windom's film debut.
 His first leading role came in the sitcom The Farmer's Daughter (19631966), a series based on the 1947 film about a young Minnesota woman (played by Inger Stevens) who became the housekeeper for a widowed congressman (Windom)
 Windom briefly left the show in 1990 to work on the first television version of Parenthood, based on the 1989 film of the same name, playing the role of patriarch Frank Buckman--a role played by Jason Robards in the film and, later, Craig T

