"Any Old Port in a Storm"
My personal favorite (and, I was glad to hear, also Peter Falk's). Donald Pleasence OWNED the role of Adrian Carsini and the way he and Falk played off each other was marvelous. DP deserved an Emmy for this episode. It's fun to see Columbo educate himself to outwit the killer, yet gain his genuine respect.
My people skills are fine. It's my tolerance of morons that needs work.