The Dick Cavett Show was excellent. It's still available on Decades TV (on the air in many cities). A far cry from those three little twerps who have the late-night shows on the major networks now. All three professing to be Catholics (I would have taken Jimmy Kimmel for a Jєω if I had not been told otherwise), they are una voce dicentes with the liberal party line and Trump Derangement Syndrome.
And Powell's "Rivers of Blood" speech was actually quite tame compared to some other rhetoric you'll hear.