The dead walk earth in The Walking Dead.

Andrew Lincoln in The Walking Dead.

Sheriff Rick Grimes (Andrew Lincoln) holds a pistol to the head of Merle Dixon (Michael Rooker) in The Walking Dead.

Sheriff Rick Grimes (Andrew Lincoln) wakes up in a hospital to find the world has irrevocably changed in The Walking Dead.

Writer-director Frank Darabont in Atlanta on the set of The Walking Dead.

Jon Bernthal plays Shane Walsh in The Walking Dead.

Steven Yeun escapes the undead in The Walking Dead.

Sheriff Rick Grimes (Andrew Lincoln) wakes up alone in a hospital in The Walking Dead.

A comparison of the comic and real-life characters from The Walking Dead series.

Steven Yeun, Laurie Holden, IronE Singleton and Jeryl Prescott in The Walking Dead.