Columbo: Oh, uh just one more thing... - TWoP Forums:
A few of my favorite episodes, many of which have been mentioned here:
Swan Song (featuring Johnny Cash): Cash gives a marvelous portrayal, and the way Columbo sets him up in the end is great. Yet another episode where Columbo has a great respect for the villain (or, at least this time, of his talent).

I liked Johnny Cash v much in it. sympathetic villain. sad eyes. nice smile. tall. nice ending scene, Aren't you afraid to be up here alone with a killer?, No I think you'd have confessed even if I hadn't caught you. A man who can sing like that can't be all bad.