I mean, the main theme of this episode is pretty much in the title, but if you want to know more, Marty and Dan stumble upon a potential real-life murder-mystery conspiracy, we meet Dr. David Banner, and Barbara Eden gets Mayberry so horny that the mayor fucking dies.
It's a double-header of Season 02 Episode 15 and 16 - "Bailey's Bad Boy" and "The Manicurist"