'Chuck': 'Gretas' Isaiah Mustafa and Stacy Keibler return in March

isaiah-mustafa-stacy-keibler-chuck-320.jpgWe've known for a while that "Chuck" would be bringing back two of the actors who played "Greta" earlier this season. Now we know exactly when.

Isaiah Mustafa and Stacy Keibler will have a return engagement as Gretas Nos. 2 and 3 in the March 14 episode, NBC says. The episode is called "Chuck vs. the A-Team," and in it, Chuck ( Zachary Levi) worries that the Gretas are so perfect that they'll make him and his occasionally malfunctioning Intersect obsolete.

Also in the episode, Chuck and Sarah ( Yvonne Strahovski) suspect that Casey ( Adam Baldwin) may have gone rogue, and they investigate. You'll also see returning guest star Robin Givens as Jane Bentley, the woman who offered Casey a new gig at the end of "Chuck vs. the Masquerade."

"Chuck" creators Chris Fedak and Josh Schwartz promised us earlier this month that the "shameless stunt casting" of the Gretas would have a payoff. We don't know exactly what that is yet, but we're going to enter the realm of pure speculation here and posit the following theory:

What if the job Bentley has offered Casey is to be the team leader of Project Greta?

The pieces would seem to fit: Bentley and her project made some major add-ons to Castle in the last episode. Two previously seen Gretas are coming back into the story just as Casey considers a new assignment -- which, Bentley says, will let Casey put his training to greater use than on Team Chuck. We could be (and often are) 180 degrees off in our "Chuck" theorizing, but it feels like a logical place for the story to go.

What say you, "Chuck"-leheads? What do you think is behind the return of the Gretas?
Photo/Video credit: NBC
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