The Urban Haunted House in Rockville held casting calls for Zombie actors Saturday at the Rockville Pike location. With less than a month before The Warehouse: Project 4.1 opens Sept. 28, Justin Watson, director of hiring and public relations, is busy fielding calls from prospective zombie actors and checking the progress of installing signs outside. "We could do this, and we could do this better," Watson said. The group eventually formed Hallow Inc. John McCambridge and Christian Lowe, who own a construction company, became director of production and director of construction, respectively. "In 2012, they brought it to Rockville," Watson said. "Here, they started doing testing, and something went terribly wrong. ... What it's doing is creating these mutant or hybrid-type zombies." He said TV shows such as AMC's "The Walking Dead" have fueled the zombie craze, and now, "everybody wants to be a zombie."