The premise of the show is always one of the worst, it's the only detective show where the detective turns up BEFORE the crime occurs. If I was one of Aunt Jessica's multitudal nephews or nieces I would never invite her to any event within 30 miles of me as you know a death or two will happen.
Columbo is the guy who never gives up and always gets his man. In almost every episode, and you know its coming but still love it, is the moment when Columbo leaves the room and just hesitates and says along the lines of " Ah... er, just one more thing sir, and I know its probably nothing, but I...