The cast of Glee  stuck together in LA last night during their PaleyFest  panel. The crew chatted about upcoming episodes, returning characters, and what's in store for this year's prom. Lea Michele  missed the event as she was busy making out with Ashton Kutcher for New Year's Eve  in NYC, and in her absence, Chris Colfer let it slip that he'll be leaving The Warblers  and returning to McKinley High. The show's creator Ryan Murphy dished that we'll be seeing more than just Gwyneth Paltrow  in upcoming episodes, with Kristin Chenoweth also making a return cameo , and Jane Lynch  wouldn't mind getting Carol Burnett back . There are plans for an episode dedicated to Fleetwood Mac's Rumours album , and as the end of the school year nears they'll be building to a pivotal prom night — especially for Kurt and Blaine. If you missed a moment of this week's show, check out Buzz's recap .