Chuck continued to build toward what is certain to be a suspense-filled season finale last night. Read our critic's take on the latest episode HERE.

Looking ahead, "Chuck Versus the Cliffhanger" will hinge on Chuck and Sarah's wedding. Will they actually finish their vows? Or will Vivian Volkoff get in the way? And how can Alexei Volkoff help?

We'll be tuning in to find out. And fans can get an early look at the installment via the official preview below:

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