When Chuck has a series of disturbing dreams about Beethoven and Zamibia just as the Zamibian President is about to visit a Beethoven concert, he thinks the Ring may be trying to kill the President. General Beckman thinks otherwise and sends Chuck to see a CIA therapist. Meanwhile, Devon and Ellie are back at home after Devon's supposed Malaria infection, and Anna Wu shows up unexpectedly at the Buy More.

Chuck and Sarah ride on the same train as the Basque terrorist Juan Diaz Arnaldo.

Shaw teams up with Chuck and Sarah to find the Ring operative who killed his wife

When Chuck can choose between the best agents for an undercover mission, he has only Sarah on his mind, so he and his friends team up to win her back.

Chuck's fate as a spy rest on a single mission. 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.

Casey goes on a mission for his old commander James Keller, but something goes wrong, so now Chuck and Sarah have to help him out.

When the Ring plans to turn a CIA agent, the team has to rely on the Intersect for information, but due to emotional interference, Chuck has problems flashing, so he is "grounded". Meanwhile, the Buy More employees are re-evaluated by potential buyers, while Morgan ends his friendship to Chuck.

Chuck promises to cook dinner for Ellie, Devon and Hannah, but must first complete a mission that involves him impersonating the world's most dangerous assassin. Meanwhile, Sarah tries to keep her relationship with Shaw strictly professional.

After Chuck and Hannah help out Shaw in a critical situation recovering a mask, they are teamed up on the follow-up mission, while Shaw teams himself up with Sarah. Meanwhile, Morgan and Ellie team up to get to the truth behind Chuck's secretive behavior.