Chuck’s normal life is turned upside down when a mysterious email from an old friend loads stolen government secrets into his brain, putting him in the middle of a CIA and NSA operation.

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.