Glee is an American musical comedy-drama television series that aired on the Fox network in the United States from May 19, 2009, to March 20, 2015. It focuses on the fictitious William McKinley High School glee club, New Directions, which competes on the show choir competition circuit while its disparate members deal with social issues, especially regarding sexuality and race, relationships, and learning to become an effective team. The initial twelve-member cast included club director and Spanish teacher Will Schuester (Matthew Morrison), cheerleading coach Sue Sylvester (Jane Lynch), guidance counselor Emma Pillsbury (Jayma Mays), Will's wife Terri (Jessalyn Gilsig), and eight club members played by Dianna Agron, Chris Colfer, Kevin McHale, Lea Michele, Cory Monteith, Amber Riley, Mark Salling, and Jenna Ushkowitz. In subsequent seasons, the main cast has expanded to fourteen and fifteen members.