|Episode Online Video|
S09, E22 (First Aired:
The gang runs into Penny's old boyfriend while out at a wine bar; Bernadette spends an evening with Sheldon; Koothrappali's introduction of his new girlfriend doesn't go as planned.
S05, E11 (First Aired:
Leonard must face the bully who targeted him in high school; Penny confronts her past actions.
S05, E12 (First Aired:
Amy is upset with Sheldon when he isn't impressed with her recent accomplishment; Howard struggles with Bernadette's aversion to children.
S05, E13 (First Aired:
Everything could change when Leonard spontaneously invites Penny to a romantic dinner.
S05, E14 (First Aired:
Penny and Leonard experiment with their new relationship; Raj forms a bond with his phone's virtual assistant.
S05, E15 (First Aired:
Leonard starts to reconsider his friendship with Sheldon; Wolowitz tries to choose his astronaut nickname.
S05, E16 (First Aired:
Sheldon goes to work with Amy in her lab when the university forces him to take a vacation; Bernadette asks Howard to sign a pre-nup.
S05, E17 (First Aired:
Sheldon and his nemesis, Kripke (John Ross Bowie), compete for a corner office; Penny feels uncomfortable after receiving a gift from Amy.
S05, E18 (First Aired:
Sheldon's routine is turned upside down when his barber gets sick; Wolowitz questions his decision to go into space.
S05, E19 (First Aired:
Sheldon plans a video game marathon with the guys instead of attending a birthday party for Amy's aunt.
S05, E20 (First Aired:
When Penny buys Leonard and Sheldon ``Star Trek'' collectibles, Sheldon finds himself haunted by Mr. Spock; after a blind date, Raj believes he has met his future wife.
S05, E21 (First Aired:
When Wolowitz works with Stephen Hawking, Sheldon is determined to meet the famous scientist.
S05, E22 (First Aired:
Knowledge of Howard's sexual history makes Bernadette reconsider their future together.
S05, E23 (First Aired:
Wedding plans are jeopardized when NASA reschedules Howard's mission; Leonard says something in the bedroom that surprises Penny.
S05, E24 (First Aired:
The gang tries to help Wolowitz and Bernadette get married before the space launch.
S06, E01 (First Aired:
Raj faces his loneliness when his friends are out on dates; while in space, Wolowitz gets drawn into a fight between Bernadette and his mom.
S06, E02 (First Aired:
Sheldon tries to intervene when he learns that Penny is thinking about breaking up with Leonard; Howard is picked on.
S06, E03 (First Aired:
Amy feels threatened by Sheldon's new assistant; Wolowitz starts to feel the pressures of being in space.
S06, E04 (First Aired:
Wolowitz's return from space isn't all he expected; game night becomes a gender war.
S06, E05 (First Aired:
The gang heads to Stuart's comic book store to celebrate Halloween; Leonard uses science to seduce Penny.
S06, E06 (First Aired:
A game threatens Sheldon's relationship with Stephen Hawking; Penny secretly signs up for a college class.
S06, E07 (First Aired:
Bernadette wants Wolowitz to move out of his mom's house; Sheldon is caught in the middle of Amy and Wil Wheaton's argument.
S09, E12 (First Aired:
Leonard agrees to meet with a psychiatrist (Jane Kaczmarek) on Penny's behalf; Sheldon and Koothrappali work together on an astronomical discovery; Wolowitz and Bernadette struggle with their feelings when Stuart moves out.
S06, E08 (First Aired:
Raj and Howard try to figure out why Sheldon disappears at 2:45 every afternoon; jealousy arises in Penny and Leonard's relationship.
S06, E09 (First Aired:
Sheldon and Wolowitz's fight over a parking spot at the university impacts the whole gang.
S06, E10 (First Aired:
When Amy gets sick, Sheldon tries to nurse her back to health; Wolowitz and his father-in-law plan a fishing trip.
S06, E11 (First Aired:
During a game, Sheldon revisits Christmas memories; Amy, Penny and Bernadette look for a date for Koothrappali.
S06, E12 (First Aired:
When Sheldon is accused of sexual harassment, he ends up getting Raj, Leonard and Wolowitz in trouble.
S06, E13 (First Aired:
As the guys don costumes and go on a road trip to a comic book convention, the ladies decide to stay home and try to interpret a comic book.
S06, E14 (First Aired:
Sheldon faces a crisis of confidence when he is forced to work with his nemesis, Barry Kripke; Raj and Howard buy expensive action figures of themselves.
S06, E15 (First Aired:
A fight between Sheldon and Leonard impacts Amy and Penny's living arrangements; while Howard is away, Raj helps Mrs. Wolowitz out.
S06, E16 (First Aired:
The guys search for a perfect Valentine's Day gift for their significant others; Stuart and Raj host a ``lonely people'' party at the comic book store.
S06, E17 (First Aired:
After a bad date, Koothrappali decides to never leave his apartment; Penny's acting skills impress Sheldon.
S06, E18 (First Aired:
Leonard, Sheldon and Wolowitz talk to junior high girls about science-related careers; Raj plans a date with Lucy.
S06, E19 (First Aired:
Howard considers whether or not he should open a letter from his father; Penny and Leonard host a ``grown-up'' cocktail party.
S06, E20 (First Aired:
The girls get involved when Leonard, Sheldon and Raj compete for tenure at the University.
S06, E21 (First Aired:
Amy tries to help Sheldon get over his compulsive need for closure when one of his favorite TV shows is canceled; Raj discovers a secret about Lucy.
S06, E22 (First Aired:
Leonard and Sheldon hire the host (Bob Newhart) of their favorite childhood TV show to perform; Bernadette and Howard run into trouble while dog-sitting for Raj's pet.
S06, E23 (First Aired:
Amy and Sheldon's relationship takes a surprising turn during a game of ``Dungeons & Dragons''; Lucy and Koothrappali have an awkward date.
S06, E24 (First Aired:
When Leonard receives an exciting opportunity to work overseas, Penny and Sheldon are thrown for a loop.
S07, E01 (First Aired:
Sheldon and Penny share secrets while Leonard is away; Wolowitz helps Raj get over his ex.
S07, E02 (First Aired:
Leonard and Sheldon's friendship is tested; Wolowitz's relationship with his mom causes a threat to his masculinity.
S07, E03 (First Aired:
Raj designs a scavenger hunt that brings out the best -- and the worst -- in the whole gang.
S07, E04 (First Aired:
Sheldon wants revenge after Amy ruins one of his favorite films; Leonard finds a way to get Penny to do anything; Stuart and Raj make online dating profiles.
S07, E05 (First Aired:
Sheldon and Amy's relationship is tested when she takes a job at his university; a fight with Bernadette leaves Howard sleeping on Raj's couch.
S07, E06 (First Aired:
Sheldon's latest scientific breakthrough leaves him feeling like a fraud; a romantic gesture between Howard and Bernadette causes Penny to up her game with Leonard.
S07, E07 (First Aired:
When Professor Proton asks Leonard for help with an experiment, Sheldon retaliates by befriending Proton's rival, Bill Nye.
S07, E08 (First Aired:
When a mistake comes to light, Sheldon makes Leonard walk a mile in his shoes; Penny decides to confront Raj's ex.