Staggering out of fiction and into a frightening new reality are the living dead-zombies. Join scientists and self-styled "zombie preppers" as they explore the probability and impact a zombie plague would have in the real world. Plus, "Apocalypse How" will explore the many other ways in which the human race could meet its end. Four different episodes and four different perspectives explore the fact and fiction of flesh-eating monsters and what it would take to prepare for them. In this almost three-hour collection, we'll venture to edge of reality and back to be sure we're ready for the unthinkable. Are you?