Zombiemania: The evolution of the zombie from its roots in Haitian voodoo to its coveted role as the world's most popular monster: from being a clumsy corpse to becoming a cannibal killer and the main agent of every infectious pandemic, the zombie has come a long way in seventy years. A look at the rising tide of zombie culture examining why something so dead has so much life in viewers' nightmares and at the box office.