First thing I remember him from – that and Dr. Strangelove. Then I don’t remember seeing him until The UFO Incident, where he played Barney Hill. Then he became Darth Vader, but still appeared in all sorts of other things, including slumming it in the MST3K-bait City Limits. Truly a versatile man.
That may be the very first televised jump scare.
Sort of apropos to this sad news. He’s there, and then he’s gone.
May the universe rest him. I liked him a lot.
Holy cow! That was hilarious! Thanks for the link. 
Could anyone else have done this better?
I saw his last two Broadway plays, revivals of You Can’t Take it With You in 2014 and The Gin Game (with Cecily Tyson) in 2015. I thought he looked a bit slower in the latter, but he was playing a lonely man in a nursing home vs. a sprightly grandfather in a loony family so it was probably just the character that was slower.
Those seem to have been his last major roles. He had a couple of small movie parts and some voice-over work, but nothing big.
And, two years ago, he retired from voicing Darth Vader, signing over rights for Disney to use archival recordings of his voice acting to create new recordings of Vader’s voice, using AI.