Sometimes it can be hard to keep feelings to yourself, especially when they involve jealousy. That's something both Chuck (Zach Levy) and Sarah (Yvonne Strahovski) have to deal with in "Chuck vs. The Mask," the latest episode of the cult favorite series on NBC.

This clip for Monday's episode is interesting, because not only do we get Chuck and Sarah "bickering like little school girls," but we also get to see at least a few words from the movie Superman, Brandon Routh.

Watch "Chuck" Mondays at 8 p.m. ET on NBC.