The National Players, America's longest-running touring theater company, presents Forever Plaid for its annual summer musical, a deliciously goofy story of a classic '50s all-male singing group who return from "the Great Beyond" to perform the show they never got to when they were alive. To Aug. 1. Olney Theatre Center, 2001 Olney-Sandy Spring Road, Olney, Md. Tickets are $26. Call 301-924-3400 or visit olneytheatre.org.