Now the head of his own spy agency, Chuck takes on a slick thief and an investor who has stolen money from dangerous criminals. Morgan aids Chuck in planning a surprise for Sarah. Jeff and Lester launch their latest scheme at the Buy More.

As Carmichael Industries takes on a missing persons case, Chuck must acclimatize himself to being Morgan's handler and deal with a rival agency. The Buy More gets a new spokesperson.

Chuck worries Morgan is letting the Intersect change his attitude for the worse. Sarah gives Casey relationship advice on Gertrude Verbanski. Captain Awesome discovers shocking news about Jeff and Lester.

Chuck and Sarah must stop an assassin after the Intersect at a Buy More convention. Jeff shows a new side to himself.

Chuck and Sarah infiltrate an unusual cult to find the designer of a computer virus. The Buy More gets a new employee.

A ruthless agent leads a team of rogue CIA spies intent on framing Chuck for a crime he didn't commit.

Chuck and Sarah discover who is behind a plot to take down their company. A computer virus creates havoc as the Buy More prepares for Christmas. Ellie tries to make Christmas plans for everybody.

When Sarah's old spy handler reappears, she goes off on her own to prevent a secret from her past from destroying her family.

Gertrude Verbanski returns and asks Casey to join her on a mission in South Beach. Jeff and Lester suspect there's more to the Buy More than meets the Eye

Morgan's time with the Intersect compels Chuck and Sarah to take on a mission in Vail and enlist the help of a famous actress. Jeff and Lester continue their own spy mission.

A confrontation with a ruthless agent aboard a Japanese bullet train becomes a hostage situation for Chuck and Sarah and puts Casey in a dire predicament.

Sarah keeps an important secret from Chuck in order to ensure the success of a mission. Ellie and Awesome receive some life-changing news.

Chuck enlists the help of his family, friends, and even the employees of the Buy More to stop Nicholas Quinn from destroying everything they have.