By RODNEY HO/rho@ajc.com, originally filed July 23, 2011

AMC's "The Walking Dead" is back to stalk the airwaves for season two Oct. 16 at 9 p.m. The one-hour drama, which is now the network's most popular show, is moving back an hour earlier than it had been last fall during its brief six-episode first season fun.

It's been in production in Atlanta since early June.

Here's an extended four-minute trailer, which shows the survivors splintering as they leave downtown Atlanta. The group faces off against zombies on a highway after their vehicle breaks down. It doesn't look too hopeful:

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By Rodney Ho, rho@ajc.com, AJCRadioTV blog