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Beckman sends in a replacement for Sarah, Alex Forrest (Tricia Helfer) when she thinks her feelings for Chuck are getting in the way.
Chuck finds Orion through a web search and the two make plans to meet up but Fulcrum gets their hands on the meeting location.
Chuck and company go after a scientist that helped build the Intersect; Morgan tries to scare off Anna.
Chuck becomes jealous where Sarah is assigned to seduce a handsome agent in order to get Fulcrum information. Morgan escapes from his mother's relationship with Big Mike by crashing at Chuck's, much to Ellie and Devon's chagrin. Meanwhile, Jeff and Lester take over the hiring the new Buy More employee and interview swimsuit models.
When Chuck flashes on Morgan's ex's new boyfriend, he's forced to betray Morgan and try and befriend Anna's new man. Meanwhile, Jeff and Lester audition to be the band at Ellie and Devon's wedding.
Chuck and Sarah go undercover as a married couple living in the suburbs where Jenny McCarthy and Andy Richter guest star as their neighbors.
Chuck has to protect a rock star in this 3D episode special.
We a high speed car chase ends with the car crashing into the Buy More, there's a hostage situation with Chuck being forced to be the leader.
Chuck sees Sarah out with her father (guest star Gary Cole) and tries to warn her after he has an Intersect flash. Meanwhile, Anna wants to move into an apartment with Morgan forcing him to grow up.
Casey's former Sensei has become a rogue spy and Chuck and Sarah join him to take him down. Meanwhile, the Awesomes come in to town to help plan Ellie's wedding.