Recurring segment similar to "Clue" on kids' educational program
This was around 1991. It was probably 321 Contact or Square One or something of the sort that played after school in Arizona. One of these kids' educational shows had a recurring segment about a detective who visited a mansion or hotel where there was a mystery to solve. The characters in this place reminded me of the board game "Clue." In the first segment, this detective (or team of detectives) arrives on a dark and stormy night. It is raining hard, and I remember a sign pointing to the detective's destination spinning around in the wind, so it was unclear if s/he had actually made it to the right place, or followed the sign in the wrong direction.
I wasn't able to watch this show every day, but was very invested in the plot, and never found out how it ended! I also remember it had some very dramatic operatic music that I loved. But sadly, I don't remember details about the characters or the mystery.
It wasn't Mathnet, it definitely had more of a gothic/noir vibe than a cop show vibe.
Does this ring a bell for anyone?