Why I remember this I can't tell you, but I think his real name was Pete Abenheim or something close to that. I recall that he was also a sports car enthusiast.
The show opened with a kid getting off a Hyde St. car and running up the stairs to Capt. Fortune's home. I believe the place was on Washington on either the first or second block above Powell on the north side of the street.
I also recall going to a live TV show which during the ewarly '50's which was being broadcast from the Sutro Mansion on Twin Peaks. I don't recall which channel it was.