AMC's 'Better Call Saul': Every sleazeball has a story to tell

Prequels are a take-it-or-leave-it proposition. Drooling fans who all but insist on origin stories and retrospective trips into the canon fodder and footnotes of their favorite character franchises will pretty much always be in the mood for a prequel, a sequel, a spin-off, an offshoot -- anything that amounts to more.