When Columbo tells him the victim is his friend Lenny, Alex puts his glasses up to his forehead. He later moves the glasses back on his nose, but in the next shot from behind the glasses are still on his forehead. See more
[referring to the water bed
You know, I've never tried one of these. My wife, that's Mrs. Columbo, she tried to get me interested.
[after Columbo lies on the bed
Well, how do you like it?
Well, to tell you the truth, sir, it feels all swimmy. Makes me wonder what Mrs. Columbo had in mind.