'The Walking Dead' rises again with massive midseason ratings

'The Walking Dead' rises again with massive midseason ratings

People still can't get enough of zombies, according to the 12.3 million viewers who checked out the midseason premiere of AMC's The Walking Dead. There has been a major personnel shakeup since the last time we saw the band of humans fighting against the hungry undead -- showrunner Glen Mazzara has left -- but with a fourth season already ordered, things are looking up for the bleak drama. But long can they keep the tension up, and how long can the characters stay alive?