Yes, here it is, one scene in the movie where they are holding the victims while Mr.Spock the commie prepares to give them a shot. What a tremendous movie that is.

Yes, he was in one other scary movie like The Sentinel that came on TV when I was a kid, not a huge part, but I recognized him, later.
Then he played Ichabod Crane in some TV movie in 1979, I think was the year. I think his first, huge break came in, “The Fly” when he was married to Gina Davis.
I need to watch The Body Snatchers. I know it’s been around forever, but I never got around to watching it.