Monster Squad

I'd remembered this show from when I was a little kid, but had forgotten what it was called.
I've described it to other people about the same age as me and usually I get a puzzled look from them (although a couple of folks seemed to recall it as well).

Quite by accident, I found out the name of the show was "Monster Squad" and it starred Fred "Gopher" Grandy as a night watchman in a wax museum.
He and the three famous monsters (Dracula, Frankenstein, and the wolfman) would go solve crimes each night when the museum closed down.

Here's the opening (with part of an episode):


Eh.... not quite the 'classic' I remember it being.