Chuck enlists his family, friends and some unexpected allies as he races to stop Nicholas Quinn from destroying everything Chuck has built over the past five years.
After a harrowing mission, Sarah returns to Chuck with a huge secret. Meanwhile, Ellie and Awesome are presented with a new opportunity that could change their lives.
In the second-to-last episode before the series finale, Chuck, Sarah, and Casey fight it out with Quinn on a bullet train. Back in Burbank, Lester and Jeff demand to know what's really going on.
Morgan's past with the Intersect comes back to haunt the team when Bo Derek shows up. Sarah and Chuck discuss how to manage raising a family while living the spy life at the same time.
Chuck and Sarah contemplate the next step for Carmichael Industries and in the meantime Casey's forbidden love, Gertrude Verbanski, walks back into his life with a questionable mission in South Beach. Meanwhile, Jeff's enchanced intelligence leads him and Lester to suspect that something unsual is happening at the Buy More.
When Sarah is forced to face an upsetting secret from her past, Chuck is on hand to help her, but she decides to deal with her problems alone. When Sarah meets her original handler she fears that those who are close to her will come to harm, particularly her mom.
As the Bartowskis prepare to celebrate Christmas, an old foe resurfaces and takes over Castle. Meanwhile, the Oomen virus is wreaking havoc across the globe and the only people who can stop it are Jeff and Lester.
Chuck and Sarah must race against time and a ruthless spy Robyn Cunnings, to destroy a dangerous computer virus. Meanwhile, Ellie and Awesome are spending their date night which takes on a dangerous turn and Morgan is sent on a special mission to recover Chuck's P.A.N.T.S.
Chuck turns to Verbanski for help tracking a computer virus; while Lester and Jeff's relationship is complicated by a new Buy More employee.
Chuck and Sarah attend a Buy More sales convention where they also have to uncover an assassin among the employees, whose mission is to take down the new intersect. Meanwhile Morgan has to deal with the consequences of having the intersect. And at the Buy More, Jeff begins to show a different side of himself.moreless
Chuck has some fears about Morgan having the intersect and it going to his head. Elsewhere Sarah helps Casey navigate his relationship with Gertrude Verbanski. And in the meantime Devon is spending his paternity leave with baby Clara at home but quickly finds it unexciting and that leads him to the Buy More where he makes a startling revelation about Jeff and Lester.moreless
The team takes on a missing persons case and have to establish themselves as Carmichael Industries in the face of a rival security firm led by GertrudeVerbanski.
Meanwhile Morgan adjusts to being the intersect and Chuck being his handler.
Also the Buy More finds a new and unlikely spokesperson who helps to drum up business.
Chuck must adjust to his new life as a business owner and being a spy
without the Intersect in his head or the support of the CIA.
Carmichael Industries' first mission is a rich thief Jean Claude and a conning investor, Roger Bale, who has stolen money from some of the world's most dangerous people. In the mean time Morgan helps Chuck with a special surprise for Sarah.
Back in the Buy More, Jeff and Lester have taken things to another level with their latest scheme.