Aired : December 9, 2011
Summary : An undercover mission spins around an extreme computer virus, an oddball cult and Chuck's hacker past. The task also forces Chuck to reach out to rival Gertrude Verbanski (Carrie-Anne Moss) for help. Meanwhile, a new Buy More staffer arrives and adds a new dynamic to Jeff and Lester's bond. Zachary Levi directed the episode.
