Due to his inability to control his new Intersect abilities, Chuck is canned as a spy. Worse, Sarah breaks up with him. Chuck vows to get his life back and tries to help his former teammates on their newest mission, only to mess up. '

Chuck is still trying to resolve his feelings over Sarah. Meanwhile, Sarah's best friend Carina returns to town on a mission to get engaged to an arms dealer and penetrate his security system to obtain a high-tech weapon. Chuck tries to talk to Sarah about their relationship, while Morgan tries to restart his imagined relationship with Carina and lies to Jeff and Lester about it. '

When a visiting dictator, Premier Goya, becomes the target of an assassination, Chuck uses his relationship with Awesome in order to protect him but worries about Awesome and Ellie's safety. '

When Awesome is mistaken for a super spy by the evil Sydney Price, Chuck must become his handler and show him the spy ropes. While on a mission for The Ring, they meet the mysterious Daniel Shaw. Meanwhile, Morgan gets promoted to assistant manager and must deal with Jeff and Lester's latest hijinks.

CIA agent Daniel Shaw assigns Chuck to his first solo mission in Paris, ignoring Sarah and Casey's wishes. During the flight to France, Chuck befriends Hannah and flashes on another passenger - the imposing Hugo Panzer. Meanwhile, Casey helps Morgan battle Jeff and Lester for control of the Buy More.

Chuck tries to balance his two very different lives as he trains a new Nerd Herder, Hannah, and gets his own asset. He thinks he can handle his asset on his own, but Sarah and Casey believe that they need to help Chuck. Meanwhile, Awesome lies to Ellie when she starts asking about Chuck and Morgan; and Jeff and Lester do some searching on Hannah. '

In this episode Chuck encounters a rogue Ring operative who stole a mask and Chuck has to attempt to recruit this operative. What begins as a simple mission quickly turns sour as Chuck realizes he has a personal history with the operative. Meanwhile Devin struggles with keeping Chuck's from his wife. '

Chuck promises to cook dinner for Hannah, Ellie and Awesome but must first assume the identity of the world's most dangerous assassin for his latest mission; Sarah tries to maintain a strictly professional relationship with Shaw.Sarah's real name will be revealed.

Chuck feels like his life is falling apart when he can't flash and gets left behind for a mission. While Shaw, Sarah and Casey (Adam Baldwin) go on without him, Chuck finds himself in a sticky situation back at the base

Casey carries out a side mission for his old commanding officer James Keller that leads to him committing treason. When Chuck learns the dark truth about Col. Keller, he and Sarah set out to break Casey out of jail and clear his name. Meanwhile, Awesome's plan to keep Ellie out of danger gets more difficult when she gets her dream fellowship.

Chuck learns that his latest solo mission will be a final test to see if he is ready to be a spy. Chuck needs to put everything he has learned into action to avoid going back to his old life while Sarah and Shaw observe his every move.

Chuck has his pick of the best CIA agents for an undercover operation, but he has only one girl in mind for the job, Sarah. Casey, Morgan and Awesome team up to help Chuck win her back.

Sarah and Shaw reunite to find the Ring operative behind the death of Shaw's wife. Sarah has faith that Shaw is ready for the mission but Chuck is worried about his emotional stability. Meanwhile, Morgan considers leaving the Buy More.

While in Europe, Sarah and Chuck realize they're traveling on a train with Spanish spies. Even though they're all alone, they decide to take on these rogue agents. Of course, this impromptu mission doesn't go smoothly. Meanwhile, Beckman orders her newest "unlikely" spy team - John Casey and Morgan Grimes - to track down the missing couple.

Chuck and Sarah are assigned to train under Craig and Laura Turner a married CIA team who, despite their impeccable record, hate one another. The Turners' stormy relationship forces Chuck and Sarah to wonder if they're doomed with the same fate. Meanwhile, Casey must train the newest member of the team-Morgan.

Chuck struggles with disturbing dreams and now he believes his most recent dream predicts danger for a visiting head of state. General Beckman, however, is unconvinced and assigns Chuck to meet with a CIA psychiatrist Dr. Leo Dreyfus. Meanwhile, Ellie gets surprising news and Anna returns to the Buy More to talk to Morgan.

Chuck's father returns when he finds out Chuck uploaded the new Intersect. Chuck enlists the help of Morgan on a new mission.

Chuck Versus the Subway

Shaw returns to threaten everything that Chuck holds dear as his friends, family and the woman he loves are all put in mortal danger. Chuck has to find Shaw and stop him before his own world gets torn apart but with Chuck finding it increasingly difficult to flash, will he find Shaw in time or will the Intersect that has saved his life so many times in the past, finally be the thing that kills him?