In the entertainment industry, what has worked well in the past almost certainly is apt to be repeated. In television, All in the Family begat Maude and Good Times. Cheers begat Frasier, JAG begat NCIS. So repetition of a winning formula is sure to click, right? Uh, not always. Hill Street Blues begat Beverly Hills Buntz and Rhoda,, which was an OK spinoff of the wonderful The Mary Tyler Moore Show, begat a certified disaster in Carlton Your Doorman.