"The school year is half this year and the other half next year," Chord says. While last year’s season finale saw the graduating class don caps and gowns, this year’s finale simply won’t be that far along in the school year.
In addition, many of the storylines Glee has been focusing on this season won’t be wrapped up by the end of the year. In particular, Sam and Blaine’s (Darren Criss) quest to figure out what really happened in the school shooting incident that ultimately cost Sue (Jane Lynch) her job as Cheerios coach. "That will go into next year so a lot of it will be resolved next season," he says.
We’ve already heard that there will be “many cliffhangers” in the Season 4 finale, so don’t expect everything to be wrapped up in one nice little bow. That said, now that Glee has already been renewed for both Seasons 5 and 6, the show will have plenty of time to address every last question.