28 September 2010,
Actor-comedian-ex-Daily Show correspondent Rob Riggle is headed to Chuck, sources confirm to me exclusively.

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 Summer Glau—who will be playing a character named Greta. - EW.com

Labels: Chuck, Guest Star, Rob Riggle, Season 4, Spoilers