One of the fun things I like to think about from time to time is what happened when Columbo's cases went to court and if the murderers were actually convicted of their crimes?
In some cases I think, without the murderer pleading guilty, several would go free. I think in Beth's case, with there being not actual witness to the crime, her partner's memory could be challenged in court regarding the order of the shots and the alarm, I think with a good legal team she'd walk out of court a free woman.
Along with the blonde actress Matti mentions, it also has Barbara Rhoades as the receptionist who has such a hard time around Columbo's cigar. She of course played the photographer in "Identity Crisis." In this story her character's a lot more "demure," but they're both great.
That makes two episode with both her and Leslie Nielsen (even though they don't really have scenes together).