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It's Ellie's big day. Chuck must save her life and her wedding from being ruined by Ted Roark and Fulcrum.

Chuck and Sarah are AWOL from the CIA eyes and are out to find Chuck's father. There both alone and without preying eyes and it allows for quality time to be alone together, just as they are getting closer Casey zeros in on their hidden location. Meanwhile, Morgan becomes the pariah of the Buy More after mistakenly getting Emmett promoted.

Chuck's father is kidnapped by Fulcrum and he learn's the only way to find him is with the one person he mis-trust the most, his ex-girlfriend Jill Roberts. Meanwhile, Emmett gets a corporate evaluation and it's up to the Buy More team to sabotage it for him.

Chuck's life seems to be coming together when first his absent-father return's and Chuck gets his dream job with his hero Ted Roark. But neither turn out quite so well.

Sarah gets a performance review after Chuck expresses his complicated feelings for her. The boys (Morgan, Jeff and Lester) try to get invited to Awesome's bachelor party.

Chuck is contacted by the one person that can erase the Intersect from his mind. He starts having trust issues and doesn't know who to lean for help. Meanwhile, Buy More is having a problems with the Buy More from Beverly Hills.

Sarah and Casey go looking for a man that seems to be behind Fulcrum's plans to build its own Intersect, forcedly leaving Chuck and Agent Barker in a safety bunker.

Chuck breaks up with Sarah after Ellie's urging, but jealousy strikes when Sarah must seduce a handsome agent in order to retrieve Fulcrum intelligence. Morgan deals with his mother's relationship with Big Mike by crashing at Chuck's apartment much to Ellie and Awesome's chagrin. Meanwhile, Jeff and Lester talk their way into hiring the new Buy More employee but decide to search for the "Buy More Babe."

Chuck helps Morgan spy on Anna and flashes on her new boyfriend; Jeff and Lester try to get Ellie and Awesome to hire their band for the wedding.

Chuck and Sarah go undercover as a married couple in the suburbs. Meanwhile, Big Mike has to face a divorce, so the Buy More team try to distract him.

Chuck has to protect a rock star. This is a special 3D episode.

A gunman holds the team hostage on Christmas Eve.

Chuck decides to spy on Sarah and her date and as he does so, Chuck has an intersect flash about him. Meanwhile, Anna asks Morgan to move in with her.

Chuck is put on a mission in hopes of getting him to forget about Jill. Meanwhile, Casey learns his sensei mentor is one of the most wanted agents, leading him to be removed fro the case. Elsewhere, as their wedding day nears, Ellie and Awesome receive a big surprise.

Chuck, Sarah and Casey are surprised to learn that Jill, Chuck's girlfriend, is a FULCRUM agent searching for the Intersect. Because of this, Chuck is asked to use his relationship to get to an agent named "Leader." Meanwhile, Captain Awesome's parents are coming for Thanksgiving and Ellie is determined to make the perfect dinner for them.

The team has to face a hostage situation at the Museum of Natural History.

Chuck's ex-girlfriend Jill returns.

Life as a spy continues to take its toll on Chuck and everyone begins to notice. He tries to explain his behavior to Ellie and Emmett Milbarge, but things become more complicated when he receives his new assignment. When a terrorist comes after Jeff, Chuck must socialize with him in order to figure out Jeff's role in the mission.

At her new job at the Orange Orange, an old friend of Sarah shows up and reveals her real name as Chuck was listening in and decides to have some fun with it to the point of almost giving away her cover. He decides to obtain more info about Sarah when the girl's husband shows up and Chuck has a flash on him. Chuck, Casey and Sarah go undercover at Sarah's high school reunion and stop the sale of high-tech bomb plans getting into the hands of Russians.

Chuck finds himself working with Casey, Sarah and Bryce and they're after a decrypted microchip which a Mr. Von Hayes has. Chuck again gets jealous when Bryce and Sarah go undercover together at a lavish party thrown by Mr. Von Hayes and he nearly blows his cover as a waiter. Chuck does manage to make a deal with Von Hayes for the microchip. Lester is now in upper management at Buy More and wants to use his position to delegate a task for Morgan to get the jocks out of the home theater room.

The "Cipher" is stolen by Sasha Banacek and the team calls in legendary spy Roan Montgomery to give Chuck lessons in seduction. Chuck gets close enough to Sasha to steal back the Cipher, but Sasha kidnaps Casey and Sarah and uses them as hostages. Now only Roan can help Chuck save the day... and Roan isn't the spy he once was.

Chuck retrieves the Cipher—the final piece needed for the new Intersect—from a formidable operative named Colt. With the new Intersect almost up and running, Chuck asks Sarah on a real date and begins to think about moving forward with his life and away from the Buy More. Meanwhile, Casey receives an assignment that will not be easy to fulfill.

Chuck finds a bug at the Buy More, cluing in Casey and Sarah that Fulcrum has knowledge of Chuck's connection to the Intersect. They have 48 hours to locate the bug's owner or Chuck will be taken into custody... permanently. Meanwhile, Chuck attempts to find Ellie's missing engagement ring.

Casey's old photojournalist flame, Ilsa, shows up with a fiancee. Unfortunately, it turns out that Ilsa was a spy all along....

Chuck and Sarah pose as a couple to stop a counterfeiting yachtsman with ties to political figures. Meanwhile, the staffers at Buy More attend the annual holiday party, which will see stricter guidelines from Big Mike.

Everyone is shocked to discover that Bryce Larkin is actually alive, but things become even more complicating when he escapes before answering any questions. Now, Chuck must figure out why his former friend betrayed him, though when he soon discovers something that shatters his confidence. Meanwhile, Morgan is placed in charge of Buy More’s holiday shopping operation.

After realizing that his relationship with Sarah had no chance of being real, Chuck decides to go out with a woman who is working at a local sandwich shop. However, things take a turn for the worse than the CIA begins to suspect that she may be involved in a smuggling operation.

Chuck finds himself battling between his cover love life and real love life when he meets Lou, a beautiful girl interested in the real Chuck. At the same time, his relationship with Sarah heats up while on a double date with Ellie and Captain Awesome. Meanwhile, a poison specialist uses 'truth' poison to get into nuclear facilities.

Chuck returns to Stanford, the university that expelled him, to help a former professor. The professor also happens to be a government operative who is being chased due to a top-secret file. Chuck must use his past knowledge to find the professor's secret and learns shocking information on Bryce Larkin, the person who got him expelled, along the way.

Meanwhile, new assistant manager Harry Tang insists on making things miserable for everyone at Buy More.

Chuck runs into a fellow agent who is living a similar life to his own. He learns that the agent is a gadgets expert and debates whether or not to turn the agent over to Sarah and Casey or let the man escape his handlers. Meanwhile, Halloween, an important holiday for Chuck and Morgan, proves to be very different this year.

Chuck encounters his first moral dilemma as a spy -- he must decide whether to side with the government and his friends or do what he thinks is right after Sarah and Casey refuse to help on a misson in Chinatown. Morgan faces his own dilemma when Buy More's sales competition may cost him his job.

Chuck is put up to an unusual task when a hot CIA woman requests help with a mission. Upon seeing her, Morgan asks Chuck to set her up with him. While working on the mission, Chuck discovers that a million dollar diamond being stashed in Malibu is being used to financially back terrorists.

Chuck continues to learn that living a double life is not easy. When he is challenged by his boss, Chuck enlists Morgan's help to prove he can be assistant manager. Meanwhile, Sarah and John send Chuck undercover for his first spy mission to track down La Ciudad, an arms dealer that nobody but Chuck can identify... at a fancy-dress art auction.

As Chuck continues to grapple with his new life as a spy, tensions rise between new partners Sarah and John. When a doctor who seems to know how to solve Chuck's problem is found dead, Casey and Walker each place the blame on one another. Who will Chuck decide to trust?

Buy More employee Chuck is unwittingly thrust into the world of CIA and FBI operatives when a secret database containing top secret information is downloaded into his brain.

ABSENCE MAKES THE HEART GROW FONDER—JORDANA BREWSTER (“THE FAST AND THE FURIOUS”) and TONY HALE (”Arrested Development”) GUEST STAR—Chuck (Zachary Levi) runs into his ex-girlfriend Jill (guest star Jordana Brewster) while on a Nerd Herd call. In an attempt to save face, he lies to the girl who broke his heart and tells her that he is more successful than he really is. When Chuck flashes on Jill’s boss—a research scientist who may have developed a deadly bio-weapon, he, Sarah (Yvonne Strahovski) and Casey (Adam Baldwin) must find out if Jill is involved. Meanwhile at the Buy More, Big Mike (Mark Christopher Lawrence) nearly chokes to death, which leads company efficiency expert Emmett (guest star Tony Hale) to implement a mandatory CPR course taught by Captain Awesome (Ryan McPartlin). Sarah Lancaster, Scott Krinsky, Vik Sahay, Julia Ling, Mark Christopher Lawrence also star.