The government sends in its top scientist to extract the intersect from Chuck’s brain, but explosive events leave him unsure whether he can trust Casey or Sarah.

Two daring missions: foil a vicious arms merchant… and nail down the assistant manager spot at the Buy More.

A visiting agent stirs tension around Sarah’s past, pushing Chuck and Sarah’s relationship into awkward new territory.

After his intuition is wrong while working on a stakeout, Chuck gets drawn into a rescue mission involving the triads. Morgan must participate in a sales competition that could decide his fate at Buy More.

On Halloween, Chuck’s attempt to juggle his spy life, a Buy More promotion, and his friendship with Morgan is complicated by an encounter with a brilliant government inventor on the run.

Chuck must confront his painful past when a mission forces him to return to Stanford, the university that wrongfully expelled him.

A mercenary wielding a toxic truth serum puts Ellie in danger, thwarting a family dinner party and Chuck’s attempt at a normal romance.

Chuck's new romance with Lou takes a dangerous turn when her deli imports are linked to a black-market smuggling ring.

After the unexpected return of an old friend, Chuck learns that a renegade group within the CIA is after the Intersect - which Chuck has to balance with the year's busiest shopping day at the Buy More.

While acting as a married couple for a high-society sting operation, Chuck and Sarah must stop a corrupt billionaire’s counterfeiting operation - which sees Morgan and Anna in the cross hairs.

A mission targeting a Russian smuggling ring takes a deeply personal turn when Casey's secret romantic past is unexpectedly brought to light.

When a hostile spy bug at the Buy More threatens to expose Chuck as the human Intersect, the team faces a frantic race against time before the government locks him in an underground bunker forever.