A cute comic book artist puts Leonard and Priya’s relationship to the test, while Sheldon tries to scare the guys for Halloween.

Amy becomes heartbroken when she discovers that Penny and Bernadette went wedding dress shopping without her.

Leonard and Penny try hanging out as friends on a ‘non-date’, but end up purposely ruining each others chances with perspective dates. Meanwhile, Sheldon enlists the help of Bernadette and…

When Stuart asks Amy out on a date, Sheldon must confront his feelings and consider where his relationship with Amy is going.

Leonard must face his fears after being contacted by his high school tormentor.

Sheldon becomes concerned when everybody begins to hang out at Raj’s apartment and discovers Leonard is the center of the group.

Sheldon is baffled by Wolowitz’s magic trick. Meanwhile, Leonard realizes dating Priya may make it impossible to continue being friends with Penny.

Sheldon’s online-game account is hacked by Todd Zarnecki, who then proceeds to steal all his items prompting the guys to go on a quest to retrieve them. Penny, Bernadette and…

Sheldon and Amy decide to start several rumors about the others as a test. Meanwhile, Howard takes his relationship with Bernadette to even higher level.

When Leonard spends too much time in the shower with Priya, Sheldon charges Leonard with two violations of the roommate agreement. However, before he can get too far, Priya uses…

Raj attempts to cure his social anxiety disorder while Penny uses Bernadette to spy on Leonard and his girlfriend.

When Howard finally breaks the news to his mom that he’s engaged to Bernadette, it lands her in the hospital.

When Bernadette receives her PhD, Wolowitz feels emasculated. Raj and Leonard swap places and Penny does something she’s regrets.

Leonard’s idea for a smartphone app derails his friendship with Sheldon.

Bernadette runs into her ex-boyfriend while attending a science event with Wolowitz.

Hoping it will make him a better teacher, Sheldon has Penny give him acting lessons. Raj has fantasies about a friend’s girlfriend.

A wealthy donor to the university makes Leonard consider how far he’s willing to go for the sake of science.

As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj’s sister.

Chuck and Sarah put aside spy work to have a weekend of debauchery, but Awesome’s plans for Chuck’s big night don’t go quite as expected. Meanwhile, Ellie’s investigation into her…

Chuck and Sarah’s wedding prep includes one final detail: ensuring that the mother-of-the-groom makes it to the ceremony alive. Meanwhile, Morgan’s responsibilities as Best Man include his most dangerous mission…

Before he can kiss the bride, Chuck must enlist his wedding party to take down Vivian Volkoff and stop her from destroying the big day. When he turns to Alexei…

With the help of his old nemesis Alexei Volkoff, Chuck and the team hunt down a deadly weapon, The Norseman. In a pre-wedding surprise, Sarah springs a pre-nup on Chuck.

When Chuck and Sarah get conned out of their wedding money, there is only one man they can turn to for help — Sarah’s conman father, Jack Burton. Meanwhile, Morgan…

Casey, Chuck and Sarah are sent to Morocco to rescue Roan Montgomery. Morgan plans to meet Alex’s mother and Mary spends some time with her family.

Chuck surprises Sarah with her old spy team, The C.A.T. Squad, leading to a mission in Rio. As The C.A.T. Squad works to settle a score with Augusto Gaez, old…

Valentine’s Day is interrupted when Chuck and the team are sent on a mission to England to protect a reclusive young heiress, Vivian McArthur. Meanwhile, Casey gets an offer from…

Chuck encourages Vivian to get in touch with her inner villain for a mission. Morgan’s search for a new roommate has unexpected results.

Chuck and Sarah suspect Casey is carrying out private missions. Chuck fears the CIA’s new operatives will render him obsolete. Morgan settles in with a new roommate. Awesome becomes uncomfortable…

Chuck is put in charge of a top-priority mission, but his leadership skills are pushed to the limit when there is a murder in Castle. Meanwhile, Awesome takes on a…

Chuck tries to create a romantic getaway for Sarah while tracking down a nano-chip at a French vineyard. Lester asks Big Mike for love advice.

Sarah takes dangerous measures to help Mary Bartowski bring down Alexei Volkoff, as Chuck worries that she may be getting in too deep. Sarah, though, must enlist the help of…

The mission to take down Volkoff reaches a dangerous new level, while big changes loom at home. As Sarah works to free Chuck’s mom, Chuck and Morgan embark on their…

Chuck and Sarah learn who is trying to destroy Carmichael Industries. Ellie’s Christmas plans come undone. A computer virus threatens to ruin Christmas at Buy More.

Sarah is forced to confront a secret from her past and feels she must do so alone, while Chuck urges her to let him help. When Sarah encounters her original…

Chuck and Sarah track an assassin who is trying to eliminate the new intersect. Morgan tries to adjust to having the intersect. Jeff exposes a new side of himself.

Chuck turns to Verbanski for help tracking a computer virus. Lester and Jeff’s relationship is complicated by a new Buy More employee.

Chuck and Sarah must race against time and a ruthless spy Robyn Cunnings, to destroy a dangerous computer virus. Meanwhile, Ellie and Awesome are spending their date night which takes…

As the team takes on a missing persons case, Chuck and company struggle to establish themselves as Carmichael Industries in the face of a rival security firm led by the…

As the team is tasked with finding one of the CIAs most wanted, Chuck fears that the Intersect may be going to Morgan’s head. Meanwhile Sarah helps Casey navigate his…

The episode continues from the early events of the Constance Alumni event. Georgina Sparks turns up at the event looking for trouble. Serena and Vanessa reluctantly join forces to find…