On the upcoming new episode of Glee, our favorite singers are far from gleeful.

The club is left out of the yearbook. As a result, Rachel takes action and locks the group into a local commercial.

Meanwhile, Quinn is intent on getting included in the Cheerios yearbook photo; while Will and Terri's relationship is shaken to its core.

As always, we'll recap and review the episode after it ends, replete with new Glee music and quotes. For now, check out the photos below from "Mattress."

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.