Here is the trailer for the Walking Dead Season 2. Walking Dead synopsis: Waking up in an empty hospital after weeks in a coma, County Sheriff Rick Grimes (Andrew Lincoln) finds himself utterly alone. The world as he knows it is gone, ravaged by a zombie epidemic. The Walking Dead tells the story of the weeks and months that follow after the apocalypse. Based on Robert Kirkman’s hugely successful and popular comic book series, AMC’s new original series, The Walking Dead.