As is customary on Glee, one of the episodes before the midseason finale (December) 6 will feature a glee club competition: Sectionals.  But unlike the last two years, there are some additional roadblocks this time around.

First of all, the glee club is no longer united.  Santana, Mercedes and Brittany have broken off into a separate group called the Troubletones.  And the Troubletones are quite good.  Sure, they're not a powerhouse like Vocal Adrenaline was, but they're some pretty stiff competition.

Another big problem is that Rachel has been barred from singing in Sectionals because she tried to rig the student election so that Kurt could win.  After confessing what she did to stop Kurt from getting suspended, Principal Figgins prohibited her from competing.  Sure, the glee club has Blaine now, but without Rachel - and three other ladies - they're kind of short-staffed.

Finn, of course, has a solution: bring back Sam.  He and Rachel go searching for Sam, who will make a return appearance in this episode after leaving the cast before the season 3 premiere.

At Sectionals, the Troubletones perform a mash-up of "I Will Survive" and "Survivor".  The glee club seems to think they've got the competition in the bag, but then the Troubletones make with the Destiny's Child and the dancing and the crowd really gets into it.  Watch the performance of the Troubletones' mash-up below.

Don't miss an all new episode of Glee on Tuesday, December 6.  You can also view a trailer and photos for the episode here.