The composer Philip Glass is best known for his experiments in minimal music and his film scores, from The Thin Blue Line to the most recent Fantastic Four movie. (Yes, really.) But over the past four decades, he’s also written more than a dozen avant-garde operas, none of which the Washington National Opera has staged—until now. This November, WNO will mount a six-performance production of Glass’ 2007 opera Appomattox. The revised version of the Civil War–civil rights work, with a libretto by Christopher Hampton, adds an act about Martin Luther King Jr. and Frederick Douglass. Glass will sit down for a conversation with WNO Artistic Director Francesca Zambello ahead of the premiere. While it’s easy to guess some of the topics of discussion—why WNO waited so long to stage a Glass opera, why Glass chose to revise Appomattox—let’s hope Zambello tries to break as much new ground as Glass over his career. Philip Glass speaks at 5:30 p.m. at the Kennedy Center Theater Lab, 2700 F St. NW. $15. (202) 467-4600. kennedy-center.org.