SECAUCUS, N.J. — When the lights come on, the scene in front of you isn't pretty: There's a gagged woman handcuffed to a wall, a TV on at full volume and a guy lying on a couch with a gaping belly wound.Such is the troubling landscape that greets audience members at the beginning of the touring immersive show recreating the chilling world of AMC's "The Walking Dead," in which the world has been plagued by a zombie apocalypse.