In order to succeed, a spinoff needs its own premise -- something that engages the loyal carryover audience and draws in new viewers. It needs energy; you can't stick a set of writers and actors who are tired of the same old shtick into a new show and expect them to breathe life into, well, the same old shtick. But most of all it needs compelling characters.Without one or more of the most interesting characters from the original series - those who routinely steal the scenes, elevate material that's far beneath them, and make the audience keep watching as the quality of the show declines - a spinoff can't succeed. Here are just a few characters I find absorbing enough to imagine an entire show around.