Zombie movies come preloaded with some fairly clear-cut expectations. Unless they’re going the comedic route, a la Zombieland or Return of the Living Dead, a zombie flick should be scary, feature folks shambling running rising from the dead, and show lots of gory flesh-munching and grievous bodily harm. Or, you know, they can just make it up as they go along. World War Z chooses that latter route, and the result is a PG-13 zombie film that offers very little to chew on, but while it fails as an entry into the zombie sub-genre it finds a little bit more success as an action/adventure with an unconventional leading man. Gerry Lane (Brad Pitt) is new to the stay-at-home dad thing, but his past job as an elite problem-solver for the government used to being dropped into international hot zones comes in handy when a family drive through Philadelphia is interrupted by a zombie apocalypse. His old governmental cronies come calling, and after a terrifying night holed up in an infested apartment building Lane and company are airlifted to the safety of an aircraft carrier. The catch is that in exchange for his his wife (Mireille Enos) and children’s loosely guaranteed safety they expect Lane to head out into the big, undead world in search of patient zero and a cure.