I should have mentioned it some time ago but my pal Steve Thompson has set up a weblog of goodies from his "pop culture" library. Everything there is of interest but he just put up this item, which is an ad for the short-lived Lorenzo and Henrietta Music Show from 1976. This was a folksy talk show with Lorenzo, his wife and some friends and it went on the air and off in record time. (Steve has the chronology slightly wrong, by the way. Lorenzo started voicing Carlton the Doorman on the Rhoda show in 1974.)
Lorenzo didn't talk about it much when I knew him. It represented a very bad episode in his life due to some personal tragedies that occurred around that time. They made it very difficult for him to do the show…and the fact that he knew he wasn't at his best on-air made him even more depressed. One time when someone asked him why the show had been cancelled so quickly, he replied, "Bad ratings, plus I was in no shape to do it."
Anyway, browse around Steve's site. Plenty of fun stuff there to look at.