Air date: 2/16/09

General Beckman sends Chuck, Sarah and Casey to an L.A. suburb on an undercover mission, with Chuck and Sarah posing as a married couple. Meanwhile, Big Mike is introduced to internet dating by Morgan, Lester and Jeff at the Buy More. To Morgan's dismay, Big Mike's internet date turns out to be his mother. After accidentally obtaining a part of Fulcrum's Intersect data, Chuck discovers that the suburban development is a front for Fulcrum. The team is captured by their neighbors including Brad and Sylvia, who turn out to be Fulcrum agents. As a test, the Fulcrum agents upload their entire Intersect to Chuck's brain. Casey escapes and incapacitates the Fulcrum agents, saving Chuck and Sarah.

Chuck vs. the Best Friend

Air date: 2/23/09

When Chuck flashes on Anna's new boyfriend, Chuck is ordered to befriend Jason to determine the extent of his connections with the Triad. After Morgan is caught snooping around, Chuck must convince the Triad that Morgan is not a threat, just a loser stalking Anna. Morgan, not knowing how close to death he just came, is hurt by Chuck's actions. Chuck foils a plot to kill the Chinese ambassador and Anna and Morgan reconcile.

Chuck vs. the Beefcake

Air date: 3/2/09

The team is ordered to retrieve Fulcrum intelligence hidden in a belt buckle that is in the possession of an agent named Cole Barker, who they code-named Beefcake. Upon capture, Cole is revealed to be an undercover MI6 agent. Though broken up with Sarah, Chuck becomes jealous after noting Sarah's interest in Cole. Chuck, Cole and Sarah are captured by Fulcrum when they attempt to use Cole to lure Fulcrum. They are threatened with torture before being rescued by Casey and a tactical squad. Meanwhile, Lester and Jeff's search for a new Buy More employee turns into a search for the "Buy More Babe". Morgan's reluctance to live with his mother while she is in a relationship with Big Mike leads to Chuck and Morgan deciding to move in together. However, after Cole is captured again by Fulcrum, Chuck is placed under 24-hour surveillance and has to move in with Sarah.

Chuck vs. the Lethal Weapon

Air date: 3/9/09

Cole escapes after being tortured by Fulcrum and returns to Castle. Sarah and Casey are assigned to hunt down a scientist code-named Perseus, who is the mastermind behind Fulcrum's plans to build their own Intersect. They fail to retrieve Perseus but escape Fulcrum's capture after a less-than-graceful rescue by Chuck and Cole. After locating the lab of Perseus, Chuck learns that a man code-named Orion is the designer of the Intersect and headed the entire Intersect project. Sarah wrestles with her feelings for Cole and Chuck, ultimately choosing Chuck. Morgan tries to talk Anna out of moving in with him after previously agreeing to move in with Chuck, but later decides that living with Anna is what he truly wants.