Actor-comedian-ex-Daily Show correspondent Rob Riggle is headed to Chuck, sources confirm to me exclusively.

The shocking twist? He’s not playing a character named Greta. I swear!

Riggle will instead guest star as Jim Rye, a super smart, intensely positive, and slightly crazy CIA agent who’s brought in to help Chuck become an even better spy.

He’ll appear in this season’s eighth episode, which also features a guest turn by fanboy icon Summer Glau—who will be playing a character named Greta.

http://ausiellofiles.ew.com/2010/09/27/chuck-enlists-rob-riggle/