Meanwhile, Ellie Bartowski-Woodcomb (Sarah Lancaster) discovers the true identity of Agent X while investigating her father Stephen's computer.

As some of the guests attempt to escape the camping trip, they are ambushed by Riley's mercenaries, who are tracking the laptop Devon unknowingly brought with him.

Startled, the team reads the files on his last mission; which was to assist on a complicated cover-up, a black operation posing as international arms dealer Alexei Volkoff.

The personality and knowledge of Volkoff was uploaded into the prototype Intersect by Stephen Bartowski and downloaded into the mind of Hartley so he could use it as a cover.

With the realization, Casey closes the spy will and orders everyone to keep quiet about this, since the information about CIA creating its "own worst enemy" was simply hidden and buried to ensure secrecy, and that they will be most likely eliminated if anything is told.

"Chuck Versus Agent X" was one of many episodes to be directed by producer Robert Duncan McNeill,[2] and was written by Phil Klemmer and Craig DiGregorio.

[3] Chuck cast members revealed at the 2011 Chicago Comic & Entertainment Expo that the season would include a "funny, camping-themed" bachelor party episode featuring Casey, Big Mike, and the fictional band Jeffster!.

Lancaster enjoyed filming the scene, which took hours to perform, solely due to Yvonne Strahovski's discomfort.

"[9] However, McGee continued, "Much less successful was anything involving Chuck's bachelor party and Big Mike/Jeffster's subsequent desire to save their manly weekend.

"[9] Eric Goldman of IGN gave this episode a score of 8.5 out of 10, writing that "the best element in all of this was the introduction of Volkoff, or make that Hartley Winterbottom's, mother and the bonding that occurred between her and John Casey.