@RAu68,
If i may humbly interject here, As one who grew up in La La land and has traversed almost every mile from Santa Monica to San Bernardino, rest assured about the studios being in fire danger areas. The studios are on 6th street near Wilshire Blvd which runs through the very heart of both L.A. and Beverly Hills. Hope this fulfills your inquiries on that end.
As for the shows themseves, everybody's conspiracies, theories and conjectures may have uhm, certain validity. I'd love to hire Robert Stack to get to the bottom of the mystery but unfortunately, he and his show are long gone.