High Quality Content by WIKIPEDIA articles! "Mattress", also known as "Once Upon a Mattress", is the twelfth episode of the American television series Glee. The episode premiered on the Fox network on December 2, 2009. It was written by series creator Ryan Murphy and directed by Elodie Keene. In "Mattress", the glee club is omitted from the school yearbook. Club member Rachel Berry (Lea Michele) has the team cast in a local mattress commercial in an attempt to raise their social status, but her actions inadvertently result in them becoming ineligible to compete at sectionals. Club director Will Schuester (Matthew Morrison) discovers that his wife Terri (Jessalyn Gilsig) has been lying to him about being pregnant. Gilsig hoped that "Mattress" would be the episode in which "anti-Terri fans joined Team Terri".