Here's the ABC Sunday Night Movie intro for their repeat broadcast of Phillip Kaufman's 1978 remake of Invasion Of The Body Snatchers, starring Leonard Nimoy and Donald Sutherland. For me, this was the scariest sci-fi flick of the Seventies, even edging out Alien. And, because (unlike Alien) Invasion was rated PG instead of R, I actually got to see it unaccompanied by parental units... which probably added to the fright factor. Of course, I also got to see Brooke Adams topless, so it balanced out.
Needless to say, the version that aired on ABC used an alternate, "clothed" take of that scene.