The sixth and final season of "Glee" begins in January and many of your favorite stars will be returning for the final season. One of whom is Mark Salling, who plays Noah "Puck" Puckerman. Mark recently revealed that although he is happy to be back as a full-time cast member, there is a serious hole in the final season without Corey Monteith. When Corey (Finn Hudson) died in July 2013, the "Glee" cast was in total shock. Even now, the cast knows it's going to be hard to say goodbye to the series without him by their side. "Cory Monteith was a great leader as a character and person in real life. It's a big, obvious hole. I still think about him all the time," Mark told "People." "He was kind of like the quarterback of the show, which sounds cliché because the [tribute] episode was called that, but he was kind of like that in real life." Read More »