Playwright Annie Baker and actors Aaron Clifton Moten and Louisa Krause discuss the new production of “The Flick.” In a run-down movie theater in central Massachusetts, three underpaid employees mop the floors and attend to one of the last 35 millimeter film projectors in the state. Their battles and heartbreaks play out in the empty aisles, becoming more gripping than the lackluster, second-run movies on screen. The play earned Baker a Pulitzer Prize, and Moten and Krause will be reprising their acclaimed performances. Playing at the Barrow Street Theatre.