Really, shouldn't the title "Walking Dead showrunner" be bracketed by air quotes? Nonetheless, here's the new boss.

Glen Mazzara is no longer running AMC's "The Walking Dead." Now we know why.

AMC has renewed "The Walking Dead" for season four, but showrunner/executive producer Glen Mazzara is departing.

A few weeks ago, Frank Darabont -- who was fired as the showrunner of "The Walking Dead" in between the first and second season -- leaked what he had in mind for the first episode of the second season.