William Windom and Collin Wilcox - To Kill a Mockingbird
For a real mind-blower, William Windom appeared in a made-for-Internet-only version of Star Trek, The Original Series, called Star Trek: Phase II, in which he reprised his role as Commodore Decker.
http://en.wikipedia.org/wiki/Star_Trek_New_Voyages:_Phase_II
Paramount, which holds the rights to the Star Trek franchise, agreed to the production, as long as it was entirely non-profit.
It is still in production, making about one episode a year.
He was the guest star in my favorite episode of “Night Gallery.” The title of the episode was “They’re Tearing Down Tim Riley’s Bar.”
William Windom and Collin Wilcox - To Kill a Mockingbird
Trivia bit: Decker from Star Trek: the Motion Picture was originally intended to be the son of the Planet Killer's Decker. (Source: how the hell should I remember where I heard something 30+ years ago? It's true, I tell you!)
He was on everything in the 60’s and 70’s...we only had three channels, and it seemed like he was on all of them at the same time...
I remember him playing Thelma Harper’s ex-boyfriend who was about to invest in the then early-1980s range for home computers in one of the funnier episodes of “Mama’s Family”.