This 1959 clip shows that the mystery-guest segment of the old What’s My Line? show was harmlessly amusing. (Certain amusements, I’m saying, are definitely harmful.) If a present-tense show tried reviving this I’d probably watch. I chose this clip because Gore Vidal was one of the panelists, and because Arlene Francis says to James Cagney at the end that “you’re a wonderful performer and we don’t see nearly enough of you in films.” A year or so later she starred with Cagney in One, Two, Three.