Not Nobody, written by Brian Dykstra, is a play about ethics and the legal system. Under the direction of Margaret Perry, the work centers on McAlester Daly (Dykstra himself), a former ethics professor. One evening, he is out walking when a couple of cops—Officer Ricketts (Sheffield Chastain, who deftly plays a wide range of characters) and Officer Chavana (Kathiamarice Lopez, who brings a crispness to every role she plays)—stop him. He’s in a neighborhood where a middle-aged white guy typically wouldn’t be, and the cops find that odd.