“Agent” (*1/2 out of four) was an utterly disposable thriller about as blunt and unimaginative as its title; a group of friends (Derek Ting, Marikah Cunningham, Eric Keitel) go to the desert for a gun instruction course and end up (yawn) unleashing an evil force that threatens to rise up and take over the world. Weak mix of action melodrama and zombie horror has a few pretty shots of the desert but takes way too long to get going and mostly fires blanks. Lead actor Ting was also movie’s writer and director but doesn’t do much that George Romero did better nearly 50 years ago in “Night Of The Living Dead.”