Penny is a fictional character portrayed by Kaley Cuoco in the TV series The Big Bang Theory.
In the first episode they appeared in, titled Pilot (season 1), they were 21 years old.
They appear in all 279 aired episodes and have accumulated 739119 positive votes.
The character of Penny is mainly associated with Leonard Hofstadter, Sheldon Cooper and Raj Koothrappali.
Episodes279
Pilot
episode S1.E1 september 2007A pair of socially awkward theoretical physicists meet their new neighbor Penny, who is their polar opposite.
The Big Bran Hypothesis
episode S1.E2 october 2007Penny is furious with Leonard and Sheldon when they sneak into her apartment and clean it while she is sleeping.
The Fuzzy Boots Corollary
episode S1.E3 october 2007Leonard gets upset when he discovers that Penny is seeing a new guy, so he tries to trick her into going on a date with him.
The Luminous Fish Effect
episode S1.E4 october 2007Sheldon's mother is called to intervene when he delves into numerous obsessions after being fired for being disrespectful to his new boss.
The Hamburger Postulate
episode S1.E5 october 2007Leslie seduces Leonard, but afterwards tells him that she is only interested in a one-night stand.
The Middle Earth Paradigm
episode S1.E6 october 2007The guys are invited to Penny's Halloween party, where Leonard has yet another run-in with Penny's ex-boyfriend Kurt.
The Dumpling Paradox
episode S1.E7 november 2007When Howard hooks up with Penny's old friend, his absence in the gang causes problems for the rest of the guys.
The Grasshopper Experiment
episode S1.E8 november 2007When Raj's parents set him up on a blind date, he finds he can talk to women with the aid of alcohol.
The Cooper-Hofstadter Polarization
episode S1.E9 march 2008Leonard and Sheldon's friendship is put to the test when Leonard wants to present a paper they co-authored at a physics convention, but Sheldon doesn't.
The Loobenfeld Decay
episode S1.E10 march 2008Leonard lies to Penny so that he and Sheldon can get out of watching her perform. However, Sheldon believes that the lie has too many loose ends, so he comes up with a new, unnecessarily complex one to replace it.
The Pancake Batter Anomaly
episode S1.E11 march 2008When Sheldon gets sick, Leonard, Howard and Raj go AWOL, leaving a reluctant Penny to deal with him.
The Jerusalem Duality
episode S1.E12 april 2008Sheldon decides to give up his work and focus on other tasks when a 15-year-old prodigy joins the university, so the other guys come up with a plan to get rid of him.
The Bat Jar Conjecture
episode S1.E13 april 2008Sheldon becomes so intent on demonstrating his intellectual superiority over the other guys that they kick him off the Physics Bowl team and replace him with his nemesis, Leslie.
The Nerdvana Annihilation
episode S1.E14 april 2008Penny gets mad at the guys when their full scale model of a time machine causes her to miss work, which prompts Leonard to give up all of his nerd memorabilia.
The Pork Chop Indeterminacy
episode S1.E15 may 2008Leonard, Howard and Raj fight over Sheldon's twin sister when she arrives in town. Raj takes part in a drug trial to suppress his selective mutism.
The Peanut Reaction
episode S1.E16 may 2008When Penny learns that Leonard has never had a birthday party, she and the rest of the guys plan a surprise party for him.
The Tangerine Factor
episode S1.E17 may 2008After a bad breakup, Penny finally agrees to go out on a date with Leonard, however they both develop doubts and turn to Sheldon for advice.
The Bad Fish Paradigm
episode S2.E1 september 2008Leonard becomes concerned when his date with Penny ends abruptly and she starts blowing him off. When told the truth, Sheldon would rather move out than keep Penny's reasons a secret from Leonard.
The Codpiece Topology
episode S2.E2 september 2008Sheldon is annoyed when Leonard turns to Leslie for comfort after seeing Penny with another guy.
The Barbarian Sublimation
episode S2.E3 october 2008Sheldon introduces Penny to online gaming, however she refuses to quit after becoming addicted.
The Griffin Equivalency
episode S2.E4 october 2008The guys struggle to cope with Raj's arrogance after he is featured in a People magazine article.
The Euclid Alternative
episode S2.E5 october 2008Sheldon annoys the gang when Leonard can't drive him to and from work, so they try to teach him how to drive.
The Cooper-Nowitzki Theorem
episode S2.E6 november 2008Sheldon is flattered when a graduate student takes a shine to him, however her extreme devotion becomes too much to handle.
The Panty Piñata Polarization
episode S2.E7 november 2008Penny plans revenge when Sheldon bans her from his and Leonard's apartment, while Howard and Raj use the latest technology to try to find the house being used in "America's Next Top Model."
The Lizard-Spock Expansion
episode S2.E8 november 2008Leonard and Howard's friendship is jeopardised when Leonard steals a girl from Howard.
The White Asparagus Triangulation
episode S2.E9 november 2008Sheldon believes that Leonard will wreck his relationship with Stephanie, so he decides to take matters into his own hands.
The Vartabedian Conundrum
episode S2.E10 december 2008Leonard tries to slow down his relationship with Stephanie when he realizes that they are living together, while Sheldon becomes convinced that he has an untraceable disease.
The Bath Item Gift Hypothesis
episode S2.E11 december 2008Leonard is disappointed when Penny develops an interest in an attractive physicist at the university. Meanwhile, Sheldon struggles to find an appropriate Christmas gift for Penny.
The Killer Robot Instability
episode S2.E12 january 2009Howard becomes depressed after Penny makes a cruel statement about his love life, while the rest of the guys prepare for a grudge killer robot duel against an obnoxious colleague at the university.
The Friendship Algorithm
episode S2.E13 january 2009Sheldon tries to make friends with Kripke in the hope that it will get him access to a coveted computer at the university.
The Financial Permeability
episode S2.E14 february 2009Leonard and Sheldon try to help out Penny when she can't afford to pay her rent.
The Maternal Capacitance
episode S2.E15 february 2009Sheldon hits it off with Leonard's psychoanalyst mother, but she drives Leonard and Penny to the bottle.
The Cushion Saturation
episode S2.E16 march 2009Howard hooks up with Leslie, while Penny accidentally ruins Sheldon's spot on the couch.
The Terminator Decoupling
episode S2.E17 march 2009On a train to San Francisco, Howard, Raj and Leonard fight for the affections of sci-fi star Summer Glau, while Sheldon is forced to turn to Penny for help when he leaves his flash drive behind.
The Work Song Nanocluster
episode S2.E18 march 2009Sheldon's assistance with Penny's home-based business leads to chaos.
The Dead Hooker Juxtaposition
episode S2.E19 march 2009Penny becomes jealous when a gorgeous new neighbor attracts the guys' attention.
The Hofstadter Isotope
episode S2.E20 april 2009Leonard is upset when the owner of the comic book store goes on a date with Penny, so he convinces Howard and Raj to take him to a bar so that he can pick up a woman of his own.
The Vegas Renormalization
episode S2.E21 april 2009After being dumped by Leslie, Howard heads to Las Vegas with Leonard and Raj. Meanwhile, Penny is forced to take in Sheldon after he locks himself out of his apartment.
The Classified Materials Turbulence
episode S2.E22 may 2009Penny's second date with Stuart has significant implications for Leonard. Howard enlists the guys' help with one of his NASA projects.
The Monopolar Expedition
episode S2.E23 may 2009Penny gets upset when she finds out Leonard and the guys plan to work at the North Pole for the summer.
The Electric Can Opener Fluctuation
episode S3.E1 september 2009After returning from the North Pole, a conflict among the guys sends Sheldon back to Texas and interferes with Leonard's reunion with Penny.
The Jiminy Conjecture
episode S3.E2 september 2009Leonard and Penny's first night together goes awkwardly. Sheldon and Howard wager on the species of a cricket.
The Gothowitz Deviation
episode S3.E3 october 2009Sheldon attempts to covertly alter Penny's habits, while Howard and Raj try their luck meeting women at a Goth-style club.
The Pirate Solution
episode S3.E4 october 2009When Raj has to find a new job or be sent back to India, Sheldon's solution leaves Leonard and Penny dealing with Howard as the third wheel.
The Creepy Candy Coating Corollary
episode S3.E5 october 2009Leonard is forced to ask Penny to set Howard up with one of her friends, while Sheldon seeks payback against sci-fi star Wil Wheaton.
The Cornhusker Vortex
episode S3.E6 november 2009Leonard tries to learn about football to fit in with Penny's friends. Meanwhile, a loss in a kite war threatens to end Raj and Howard's friendship.
The Guitarist Amplification
episode S3.E7 november 2009Sheldon is caught in the middle when Leonard and Penny argue about Penny's friend staying at her apartment.
The Adhesive Duck Deficiency
episode S3.E8 november 2009Penny is forced to turn to Sheldon for help when she dislocates her shoulder in the bathtub. Meanwhile, the rest of the guys accidentally get stoned in the desert while waiting for a meteor shower.
The Vengeance Formulation
episode S3.E9 november 2009Sheldon plans revenge after Kripke humiliates him on the radio. Howard develops doubts about his relationship with Bernadette.
The Gorilla Experiment
episode S3.E10 december 2009Sheldon attempts to help Penny understand physics to impress Leonard, while Howard becomes jealous when Bernadette takes an interest in Leonard's research.
The Maternal Congruence
episode S3.E11 december 2009Leonard's mother makes a visit to his dismay and Sheldon's delight.
The Psychic Vortex
episode S3.E12 january 2010Raj talks Sheldon into being his wingman at a university mixer. Leonard has trouble dealing with Penny consulting a psychic.
The Bozeman Reaction
episode S3.E13 january 2010When their apartment is robbed, Leonard and Sheldon turn to Howard and Raj to create a state-of-the-art security system.
The Einstein Approximation
episode S3.E14 february 2010Sheldon wreaks havoc when he is stumped by a difficult physics question.
The Large Hadron Collision
episode S3.E15 february 2010When Leonard is offered a trip to Switzerland on Valentine's Day to visit the CERN laboratory, Sheldon uses any and all means to be his guest instead of Penny.
The Excelsior Acquisition
episode S3.E16 march 2010Sheldon misses an opportunity to get Stan Lee's autograph because he has to make an appearance in traffic court.
The Precious Fragmentation
episode S3.E17 march 2010The guys' friendship is threatened when they find a ring from the "Lord of the Rings" trilogy.
The Pants Alternative
episode S3.E18 march 2010Sheldon seeks help from the rest of the gang in overcoming his fear of public speaking when he receives an award.
The Wheaton Recurrence
episode S3.E19 april 2010Sheldon takes on Wil Wheaton in a game of bowling. Leonard and Penny's relationship comes to a crossroad.
The Spaghetti Catalyst
episode S3.E20 may 2010Sheldon is forced to go behind Leonard's back to spend time with Penny following their breakup.
The Plimpton Stimulation
episode S3.E21 may 2010Chaos ensues when a nymphomaniac physicist visiting Sheldon hooks up with Leonard.
The Staircase Implementation
episode S3.E22 may 2010Leonard tells Penny about how he and Sheldon became roommates and what happened to the elevator.
The Lunar Excitation
episode S3.E23 may 2010Penny has a night of angry, drunken sex with Leonard, much to his confusion. Meanwhile, Howard and Raj search for Sheldon's perfect match online.
The Robotic Manipulation
episode S4.E1 september 2010Penny ends up tagging along on Sheldon's first ever date with Amy, while Howard finds an unusual use for a robotic arm.
The Cruciferous Vegetable Amplification
episode S4.E2 september 2010When Sheldon calculates the technology to download his consciousness into a robot won't be invented soon enough, he desperately tries to find a way to increase his lifespan.
The Zazzy Substitution
episode S4.E3 october 2010Following his 'breakup' with Amy, the gang become concerned with Sheldon's obsessive search for non-human companionship and call his mother to intervene.
The Hot Troll Deviation
episode S4.E4 october 2010Howard tries to get Penny's help in winning back Bernadette, but first has to confess the embarrassing reason why they broke up in the first place. Raj and Sheldon clash over a desk.
The Desperation Emanation
episode S4.E5 october 2010Sheldon is scared that he is in a relationship when Amy asks him to meet her mother, and Leonard asks Howard and Bernadette to set him up because he is the only person in the group without a girlfriend.
The Irish Pub Formulation
episode S4.E6 october 2010Leonard tries to keep everyone from finding out that he spent the night with Raj's sister, but Sheldon finds out and concocts an elaborate story to help him keep the secret from Raj.
The Apology Insufficiency
episode S4.E7 november 2010An FBI agent interviews the guys when Howard needs to obtain a security clearance.
The 21-Second Excitation
episode S4.E8 november 2010The guys camp out all night waiting to see an extended cut of Indiana Jones, while Amy joins in on girls' night with Penny and Bernadette.
The Boyfriend Complexity
episode S4.E9 november 2010Penny asks Leonard to pose as her boyfriend when her father visits. Howard, Raj and Bernadette have an awkward encounter when they spend the evening together.
The Alien Parasite Hypothesis
episode S4.E10 december 2010Amy finds she has sexual feelings for Penny's ex-boyfriend Zack, while Raj and Howard try to prove who would be the better superhero.
The Justice League Recombination
episode S4.E11 december 2010The guys enter a costume contest as members of the Justice League and convince Penny and Zack to join them.
The Bus Pants Utilization
episode S4.E12 january 2011Leonard has an idea for a new smartphone app and asks the guys for help, however Sheldon tries to take over the project, and Leonard fires him.
The Love Car Displacement
episode S4.E13 january 2011Chaos ensues when the gang spend the weekend together at a science convention.
The Thespian Catalyst
episode S4.E14 february 2011To improve his skills as an instructor, Sheldon asks Penny to give him acting lessons. Meanwhile, Raj begins having impure fantasies about Bernadette.
The Benefactor Factor
episode S4.E15 february 2011To secure needed funding for the university, Sheldon convinces Leonard to get friendly with a wealthy benefactor.
The Cohabitation Formulation
episode S4.E16 february 2011Bernadette makes Howard choose between herself and his mother, while Penny and Raj become upset when Priya returns to town and resumes her relationship with Leonard.
The Toast Derivation
episode S4.E17 february 2011Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group.
The Prestidigitation Approximation
episode S4.E18 march 2011Priya forces Leonard to choose between a relationship with her or a friendship with Penny. A magic trick by Howard has Sheldon fooled.
The Zarnecki Incursion
episode S4.E19 march 2011The guys go all out to help Sheldon find the person responsible for hacking his online gaming account, while the girls' hatred for Priya increases.
The Herb Garden Germination
episode S4.E20 april 2011Sheldon and Amy secretly experiment on the gang by spreading rumors when they hear that Bernadette is thinking about breaking up with Howard.
The Agreement Dissection
episode S4.E21 april 2011When Priya finds a loophole in the roommate agreement to throw Sheldon out for the night, Penny, Amy and Bernadette take him to a nightclub.
The Wildebeest Implementation
episode S4.E22 may 2011Sheldon invents a three-player chess game, Penny and Amy use Bernadette to spy on Leonard and Priya, and Raj tries a new drug to treat his social anxiety.
The Engagement Reaction
episode S4.E23 may 2011Howard believes that his mom suffered a heart attack because he told her that he's marrying Bernadette, Sheldon freaks out over germs, and Penny and Priya compare notes on Leonard.
The Roommate Transmogrification
episode S4.E24 may 2011Raj moves in with Sheldon after hearing Leonard and Priya engage in a Star Trek fantasy in his apartment. Bernadette receives her doctorate.
The Skank Reflex Analysis
episode S5.E1 september 2011The gang deal with the fallout from Penny and Raj's night together.
The Infestation Hypothesis
episode S5.E2 september 2011Amy gets inadvertently caught in the middle of a fight between Sheldon and Penny over a chair. Leonard tries to add some spice to his long-distance relationship with Priya.
The Pulled Groin Extrapolation
episode S5.E3 september 2011Leonard accompanies Amy to a colleague's wedding. Howard tries to convince Bernadette to live with his mother after they get married.
The Wiggly Finger Catalyst
episode S5.E4 october 2011Penny sets up Raj with a deaf friend, not knowing that she's actually a gold digger, and Sheldon decides to let his minor decisions rest on the roll of the dice.
The Russian Rocket Reaction
episode S5.E5 october 2011Sheldon takes offense when Leonard wants to attend a party with Wil Wheaton, while Bernadette tries to block Howard's opportunity to go into outer space.
The Rhinitis Revelation
episode S5.E6 october 2011Sheldon gets upset when his mother comes to visit but refuses to cook for him and attend physics lectures.
The Good Guy Fluctuation
episode S5.E7 october 2011Sheldon tries to get into the spirit of Halloween by trying to scare the guys after they prank him. Leonard seeks Penny's advice when an attractive comic book artist takes an interest in him.
The Isolation Permutation
episode S5.E8 november 2011Amy is hurt when Penny and Bernadette go bridesmaid dress shopping without her, so she turns to a reluctant Sheldon for comfort.
The Ornithophobia Diffusion
episode S5.E9 november 2011Sheldon tries to overcome his fear of birds, while Leonard and Penny attempt to hang out together strictly as friends.
The Flaming Spittoon Acquisition
episode S5.E10 november 2011When Stuart asks Amy on a date, Sheldon considers having a more serious relationship with her. Meanwhile, the guys become obsessed with a new card game involving Wild West heroes and witches.
The Speckerman Recurrence
episode S5.E11 december 2011Leonard confronts the man who bullied him in high school, while Penny realizes she did her fair share of tormenting in the past.
The Shiny Trinket Maneuver
episode S5.E12 january 2012Penny helps Sheldon work on his relationship with Amy when he trivializes one of her accomplishments. Howard is irked by Bernadette's dislike of children.
The Recombination Hypothesis
episode S5.E13 january 2012Leonard and Penny contemplate reviving their romantic relationship.
The Beta Test Initiation
episode S5.E14 january 2012Leonard and Penny develop a system to ensure their dates go smoothly. Raj finally finds a woman he can talk to - the virtual assistant on his mobile phone.
The Friendship Contraction
episode S5.E15 february 2012Leonard signs out of his roommate agreement, reducing himself and Sheldon to mere acquaintances, while Howard tries to think of a cool astronaut nickname for himself.
The Vacation Solution
episode S5.E16 february 2012When the university forces Sheldon to use vacation days, he decides to hang out in Amy's lab. Howard becomes upset when he hears Bernadette wants him to sign a prenuptial agreement.
The Rothman Disintegration
episode S5.E17 february 2012Sheldon battles Kripke for a coveted office at the university. Penny receives a very unusual gift from Amy.
The Werewolf Transformation
episode S5.E18 february 2012Sheldon wreaks havoc when he tries to get a haircut from his regular barber, who is ill. Howard runs into a few problems with astronaut training.
The Weekend Vortex
episode S5.E19 march 2012Sheldon has to choose between joining Amy at her aunt's birthday party or playing videogames all weekend with the guys.
The Transporter Malfunction
episode S5.E20 march 2012Raj gets quite a surprise when he asks his parents to set him up on a date. Penny buys Leonard and Sheldon a pair of Star Trek keepsake collectibles.
The Hawking Excitation
episode S5.E21 april 2012Sheldon uses any and all means to meet his hero, Dr. Stephen Hawking.
The Stag Convergence
episode S5.E22 april 2012The guys throw Howard a bachelor party, and some embarrassing details about his life get posted on the Internet.
The Launch Acceleration
episode S5.E23 may 2012NASA cancel, and later reinstate Howard's mission into space, coinciding with his wedding. Leonard inadvertently jeopardizes his relationship with Penny.
The Countdown Reflection
episode S5.E24 may 2012As Howard prepares for his mission into space, flashbacks show the recent events leading up to his and Bernadette's wedding.
The Date Night Variable
episode S6.E1 september 2012Raj crashes Sheldon and Amy's second anniversary and interferes in Leonard and Penny's relationship. Howard gets caught in the middle of an argument between Bernadette and his mother.
The Decoupling Fluctuation
episode S6.E2 october 2012Penny continues to have doubts about her relationship with Leonard. Meanwhile, Howard becomes the target of practical jokes on the space station.
The Higgs Boson Observation
episode S6.E3 october 2012When Sheldon hires a female grad student to assist him, a jealous Amy asks Penny to help her spy on them. On the space station, Howard begins behaving erratically.
The Re-Entry Minimization
episode S6.E4 october 2012Howard is offended when his return from space is met with little fanfare. Penny and Amy take on Sheldon and Leonard during game night.
The Holographic Excitation
episode S6.E5 october 2012While Raj plans Stuart's Halloween party at the comic book store, Howard annoys the rest of the gang by constantly talking about space, and Penny tries to take more of an interest in Leonard's work.
The Extract Obliteration
episode S6.E6 november 2012Penny enrolls in a college class and keeps it a secret from Leonard. Sheldon causes conflict with Dr. Stephen Hawking over an online game.
The Habitation Configuration
episode S6.E7 november 2012Howard makes a decision whether or not to move out of his mother's house, while Sheldon is caught in the middle of an argument between Amy and Wil Wheaton.
The 43 Peculiarity
episode S6.E8 november 2012Leonard feels threatened after hearing about Penny's study partner at school, while Howard and Raj become determined to find out one of Sheldon's secrets.
The Parking Spot Escalation
episode S6.E9 november 2012The gang are drawn into a fight between Howard and Sheldon over Sheldon's vacant parking spot at the university.
The Fish Guts Displacement
episode S6.E10 december 2012Howard tries to bond with Bernadette's father during a fishing trip. When Sheldon is obligated to take care of a sick Amy, she finds ways to take advantage of the situation.
The Santa Simulation
episode S6.E11 december 2012The girls take Raj out to a nightclub to find him a date. A game of Dungeons and Dragons rekindle old memories of Santa for Sheldon.
The Egg Salad Equivalency
episode S6.E12 january 2013When Penny finds out Alex has a crush on Leonard, Sheldon gets himself and the rest of the guys in trouble with Human Resources whilst trying to solve the problem.
The Bakersfield Expedition
episode S6.E13 january 2013The guys are stranded in the middle of nowhere when Leonard's car is stolen on the way to the Bakersfield Comic-Con. Back home, the girls try to figure out why the guys are so fascinated with comic books.
The Cooper/Kripke Inversion
episode S6.E14 january 2013Sheldon is forced to work with Kripke on a project and must concoct an elaborate lie when he can't hold up his end of the work. Howard and Raj get superhero figurines made of themselves.
The Spoiler Alert Segmentation
episode S6.E15 february 2013Leonard moves in with Penny after a fight with Sheldon, which causes Amy to want to move in with Sheldon. Meanwhile, Raj has a frightening experience with Howard's mother.
The Tangible Affection Proof
episode S6.E16 february 2013Sheldon gets Alex to buy a Valentine's Day gift for Amy. Leonard, Penny, Howard and Bernadette have a disastrous dinner together. Raj and Stuart host a "Lonely People" party at the comic book store.
The Monster Isolation
episode S6.E17 february 2013Raj falls apart after his date sneaks out on him, and Sheldon reluctantly returns the favor after Penny helps him out with his "Fun With Flags" program.
The Contractual Obligation Implementation
episode S6.E18 march 2013Leonard, Sheldon and Howard give lectures on science to junior high students. The girls ditch work to go to Disneyland. Raj devises a date for Lucy that fixes their social anxiety problems.
The Closet Reconfiguration
episode S6.E19 march 2013Howard becomes upset when Sheldon finds a letter from his estranged father whilst cleaning out his and Bernadette's closet.
The Tenure Turbulence
episode S6.E20 april 2013Leonard, Sheldon, Raj and Kripke battle for tenure at the university.
The Closure Alternative
episode S6.E21 april 2013Amy tries to help a depressed Sheldon find closure when one of his favorite TV shows is canceled. Raj becomes paranoid when he finds Lucy's blog.
The Proton Resurgence
episode S6.E22 may 2013Bernadette and Howard offer to watch Raj's dog and live to regret it. Leonard and Sheldon hire their favorite childhood star to make an appearance.
The Love Spell Potential
episode S6.E23 may 2013A date between Raj and Lucy takes both of them out of their comfort zones. After a trip to Las Vegas goes awry, the girls join in on a Dungeons and Dragons game, which causes Amy and Sheldon to re-evaluate their relationship.
The Bon Voyage Reaction
episode S6.E24 may 2013Penny is thrown for a loop when Leonard is offered a job overseas, but the news is an even bigger shock to Sheldon. Raj and Lucy's relationship comes to a crossroad.
The Hofstadter Insufficiency
episode S7.E1 september 2013Sheldon and Penny bond over missing Leonard. Howard tries to help Raj get over his breakup with Lucy. Amy and Bernadette take a trip together to a biology convention.
The Deception Verification
episode S7.E2 september 2013Sheldon feels betrayed when Leonard returns from the North Sea and wants to spend his time with Penny instead of him. Howard's latest foray into helping his mother has some disastrous side effects.
The Scavenger Vortex
episode S7.E3 october 2013The gang get competitive when they are forced to take part in Raj's scavenger hunt.
The Raiders Minimization
episode S7.E4 october 2013Sheldon gets mad at Amy for ruining one of his favorite movies, Raj and Stuart try to make their online dating profiles more appealing, and Leonard tries to play the sympathy card with Penny.
The Workplace Proximity
episode S7.E5 october 2013After a fight with Bernadette, Howard ends up on Raj's couch. Sheldon and Amy clash when Amy takes a job at the university.
The Romance Resonance
episode S7.E6 october 2013Howard plans something special to celebrate the anniversary of his first date with Bernadette. Sheldon is conflicted when he makes a major scientific breakthrough but some details have to be corrected.
The Proton Displacement
episode S7.E7 november 2013Sheldon seeks payback when Arthur "Professor Proton" Jeffries asks Leonard for help on a project instead of him. Raj gets upset at Howard for crashing his night with the girls.
The Itchy Brain Simulation
episode S7.E8 november 2013Sheldon demands Leonard make up for a mistake from their past. Penny confronts Raj's ex-girlfriend, Lucy.
The Thanksgiving Decoupling
episode S7.E9 november 2013The gang spend Thanksgiving at Mrs. Wolowitz's house. Howard tries to bond with his father-in-law, and a mistake from Penny's past comes back to haunt her.
The Discovery Dissipation
episode S7.E10 december 2013Leonard has to deal with the fallout of disproving Sheldon's new scientific discovery. Raj spends a week at Howard and Bernadette's apartment.
The Cooper Extraction
episode S7.E11 december 2013While Sheldon is at home in Texas, the rest of the gang decorate for Christmas and think about how much he has affected their lives.
The Hesitation Ramification
episode S7.E12 january 2014After Leonard tries to help Penny following a failed role on a TV show, she makes an important decision. Meanwhile, Raj and Stuart try to practice their social skills, and Sheldon navigates the intricacies of being funny.
The Occupation Recalibration
episode S7.E13 january 2014Sheldon tries to relax after he is forced to take a vacation. Leonard struggles to be supportive of Penny after she quits her job. Amy receives unwanted attention from a co-worker. Bernadette seeks Stuart's help in replacing one of Howard's comic books.
The Convention Conundrum
episode S7.E14 january 2014When the guys can't get hold of any Comic-Con tickets, Sheldon tries to hold his own convention and ends up spending a wild night with James Earl Jones. Meanwhile, the girls try to feel more mature by going to a fancy hotel for tea.
The Locomotive Manipulation
episode S7.E15 february 2014Sheldon and Amy take a train ride to Napa Valley with Howard and Bernadette on Valentine's Day. Leonard and Penny take Raj's dog to the vet when she accidentally eats some chocolate.
The Table Polarization
episode S7.E16 february 2014Leonard's purchase of a dining room table causes Sheldon to reevaluate the changes in his life. Meanwhile, Howard is offered a chance to go back to space and Bernadette struggles with whether or not to encourage him.
The Friendship Turbulence
episode S7.E17 march 2014After arguing with Sheldon, Howard tries to make amends by taking him to NASA headquarters in Houston. Penny has second thoughts about quitting her waitressing job when her car dies. Amy gets involved in trying to find Raj a date.
The Mommy Observation
episode S7.E18 march 2014When Sheldon visits his mother in Houston, he is forced to confront a new reality. Back in Pasadena, the rest of the gang reluctantly take part in Raj's Murder Mystery party.
The Indecision Amalgamation
episode S7.E19 april 2014While Raj is wracked with guilt when he tries to date Lucy and Emily at the same time, Penny wrestles with whether to take a role in a cheesy movie and Sheldon is torn trying to choose between two gaming systems.
The Relationship Diremption
episode S7.E20 april 2014Penny tries to help Sheldon when he reconsiders his "relationship" with String Theory. During a dinner with Howard and Bernadette, Raj discovers Howard once embarrassed himself on a date with Emily.
The Anything Can Happen Recurrence
episode S7.E21 april 2014When Sheldon tries to be spontaneous, it leads to unexpected friction between the girls. Meanwhile, Raj seeks Howard's help in preparing for a date with Emily.
The Proton Transmogrification
episode S7.E22 may 2014As the gang celebrate Star Wars Day, Sheldon has difficulty dealing with the recent death of Arthur "Professor Proton" Jeffries.
The Gorilla Dissolution
episode S7.E23 may 2014Penny gets fired from her movie and takes a serious look at her life. Raj sees Emily on a date with another man at the movies. Howard and Bernadette have to take care of his mother after she breaks her leg.
The Status Quo Combustion
episode S7.E24 may 2014Sheldon gets upset about his career, the destruction of the comic book store and Leonard and Penny's future living arrangements. Howard and Bernadette struggle to keep hold of a caregiver for Mrs. Wolowitz.
The Locomotion Interruption
episode S8.E1 september 2014Sheldon's trip comes to an end when he is robbed, Penny interviews for a job at Bernadette's company, and Howard is weirded out by his mother's relationship with Stuart.
The Junior Professor Solution
episode S8.E2 september 2014Sheldon is forced to teach a class as a Junior Professor. Meanwhile, Amy plays both sides when tension arises between Penny and Bernadette.
The First Pitch Insufficiency
episode S8.E3 september 2014Howard becomes nervous after NASA asks him to throw out the first pitch at a Los Angeles Angels game. Meanwhile, Leonard and Penny try to prove Sheldon wrong when he says that he and Amy have a 'superior' relationship.
The Hook-up Reverberation
episode S8.E4 october 2014Raj's honesty about his past comes back to haunt him after Emily takes a dislike to Penny. Meanwhile, the guys consider investing in the comic book store.
The Focus Attenuation
episode S8.E5 october 2014The girls head to Las Vegas, while the guys try to invent something cool, but only come up with new ways to procrastinate.
The Expedition Approximation
episode S8.E6 october 2014Sheldon and Raj test whether they could survive a dark-matter research expedition in a salt mine by simulating the conditions in a steam tunnel. Meanwhile, Leonard and Penny seek advice from Howard and Bernadette when they argue about money.
The Misinterpretation Agitation
episode S8.E7 october 2014The guys befriend one of Penny's clients when he shows up at her apartment. Meanwhile, Bernadette gets upset when Amy torpedoes an article about her for a local magazine.
The Prom Equivalency
episode S8.E8 november 2014The girls decide to re-enact their high school proms with the guys. While Sheldon feels under pressure to commit to his relationship with Amy, Howard worries about who Stuart will bring as his date.
The Septum Deviation
episode S8.E9 november 2014Sheldon panics when Leonard announces he has to go into the hospital for surgery. Raj discovers his parents have divorced.
The Champagne Reflection
episode S8.E10 november 2014While Sheldon retires "Fun With Flags", Leonard, Howard and Raj look for something significant in a dead professor's research, and Bernadette finds out what her colleagues really think of her.
The Clean Room Infiltration
episode S8.E11 december 2014Amy hosts a traditional Victorian Christmas Eve dinner as Raj's father comes to visit, while the guys try to shoo out a bird they let into the university clean room.
The Space Probe Disintegration
episode S8.E12 january 2015Raj worries a probe he designed will not work in outer space, while Leonard and Sheldon go shopping with Penny and Amy.
The Anxiety Optimization
episode S8.E13 january 2015When Sheldon becomes stuck in a rut with his work, the gang try to help him by raising his stress levels. Howard teases Raj with a game called "Emily or Cinnamon."
The Troll Manifestation
episode S8.E14 february 2015Leonard and Sheldon defend themselves against criticism from an online bully, while the girls confront embarrassing moments from their pasts.
The Comic Book Store Regeneration
episode S8.E15 february 2015Howard receives some shocking news as everyone prepares for the re-opening of the comic book store. Meanwhile, Penny tries to teach Sheldon how to "let it go," but can't follow her own advice when she learns something infuriating about Amy.
The Intimacy Acceleration
episode S8.E16 february 2015Sheldon and Penny agree to participate in an unusual experiment. Leonard, Amy, Raj and Emily spend the evening trying to escape a room with a "zombie". Howard and Bernadette run into trouble at the airport after returning from Mrs. Wolowitz's funeral.
The Colonization Application
episode S8.E17 march 2015A trip to the pet store ends in a fight after Amy learns Sheldon has applied for a one-way mission to colonize Mars. Meanwhile, Leonard surprises Penny with a very "adult" purchase, and Raj gets into trouble when he snoops around Emily's apartment.
The Leftover Thermalization
episode S8.E18 march 2015Tension arises when a magazine fails to mention Leonard in an article about the paper he co-wrote with Sheldon, and a blackout at Mrs. Wolowitz's home leads to a final family dinner in her honor.
The Skywalker Incursion
episode S8.E19 april 2015When Leonard and Sheldon are invited to speak at UC Berkeley, they take a detour to try and meet one of their idols. Meanwhile, while cleaning out Mrs. Wolowitz's house, a ping pong battle ensues when Howard and Bernadette argue over the fate of his TARDIS.
The Fortification Implementation
episode S8.E20 april 2015Howard meets the half-brother he never knew he had. Penny is invited to appear on Wil Wheaton's podcast.
The Communication Deterioration
episode S8.E21 april 2015When Raj is asked to create a message on the off chance a NASA mission discovers alien life, the guys fight over what he should do, while Penny contemplates returning to acting.
The Graduation Transmission
episode S8.E22 april 2015Howard questions his engineering abilities when he and Sheldon can't get a toy drone to fly. A cancelled flight nearly prevents Leonard from giving the commencement address at his former high school. Raj pits his parents against each other when his father cuts him off financially.
The Maternal Combustion
episode S8.E23 april 2015Personalities collide when Leonard and Sheldon's mothers meet for the first time. Bernadette reaches her limit with Howard and Stuart.
The Commitment Determination
episode S8.E24 may 2015As Sheldon presses Leonard and Penny to set a wedding date, he encounters major changes in his relationship with Amy. Meanwhile, Raj wonders if he should break up with Emily, and Howard and Bernadette struggle to ask Stuart to move out.
The Matrimonial Momentum
episode S9.E1 september 2015Penny struggles with Leonard's confession that he kissed another woman as they prepare to get married in Las Vegas. Meanwhile, Sheldon doesn't know what to do after Amy pushes pause on their relationship.
The Separation Oscillation
episode S9.E2 september 2015Leonard and Penny try to work through their marital issues. Meanwhile, Sheldon films a special episode of "Fun with Flags" after his breakup with Amy, and Bernadette feels guilty about withholding a secret from Penny.
The Bachelor Party Corrosion
episode S9.E3 october 2015The guys's skills are put to the test when they get a flat tire on the way to Mexico for Leonard's bachelor party. The girls throw Penny a mini-bachelorette party.
The 2003 Approximation
episode S9.E4 october 2015An impending change to his living arrangements inspires Sheldon to revert to 2003, before he met Penny and Leonard. Raj and Howard form a band for the comic book store.
The Perspiration Implementation
episode S9.E5 october 2015Kripke expresses interest in Amy while leading a fencing lesson for the guys. Meanwhile, Stuart seeks help from the girls in getting more women interested in the comic book store.
The Helium Insufficiency
episode S9.E6 october 2015Leonard and Sheldon go to great lengths to secure the helium they need during a nation-wide shortage. Meanwhile, the rest of the gang try to find Amy a new boyfriend on a dating app.
The Spock Resonance
episode S9.E7 november 2015While being interviewed for a documentary about Spock from Star Trek (1966), Sheldon struggles to suppress his emotions about his recent break-up from Amy. Meanwhile, Howard and Bernadette butt heads over renovating his mother's house.
The Mystery Date Observation
episode S9.E8 november 2015Sheldon, Howard and Raj post an ad online to find a new girlfriend for Sheldon. Penny and Bernadette decide to spy when Amy is secretive about who she is dating.
The Platonic Permutation
episode S9.E9 november 2015On Thanksgiving, Sheldon and Amy try to spend time together as friends and go to an aquarium, Howard reluctantly agrees to volunteer at the soup kitchen with Bernadette, Raj and Emily, and Penny discovers that Leonard knows more about her than she thought.
The Earworm Reverberation
episode S9.E10 december 2015Sheldon has a revelation when he realizes why a song was stuck in his head. Meanwhile, Amy invites Dave over for dinner despite their previously awkward date, and Howard and Raj become obsessed with a fan of their band.
The Opening Night Excitation
episode S9.E11 december 2015Leonard, Howard and Raj have to decide who will take their extra Star Wars movie ticket, while Sheldon plans something special for Amy's birthday.
The Sales Call Sublimation
episode S9.E12 january 2016Penny gets more than she bargained for when Leonard agrees to meet with a psychiatrist on her behalf to make a sale. Meanwhile, Sheldon and Raj collaborate on an astronomical discovery, and Howard and Bernadette's happiness is short-lived after Stuart moves out.
The Empathy Optimization
episode S9.E13 january 2016After being forced to deal with a sick Sheldon, the rest of the gang try to treat themselves to a Sheldon-free weekend.
The Meemaw Materialization
episode S9.E14 february 2016Sheldon is thrilled when his Meemaw comes to visit, but his excitement quickly fades when she butts heads with Amy. Meanwhile, Raj meets a girl at the comic book store who makes him question his relationship with Emily.
The Valentino Submergence
episode S9.E15 february 2016Sheldon and Amy host a Valentine's Day episode of "Fun with Flags", Leonard and Penny grapple with getting older, Howard and Bernadette find a surprise in their hot tub and Raj is torn between Emily and Claire.
The Positive Negative Reaction
episode S9.E16 february 2016Bernadette reveals her pregnancy to Howard and the rest of the gang.
The Celebration Experimentation
episode S9.E17 february 2016The gang convinces Sheldon to celebrate his birthday and throw him a party.
The Application Deterioration
episode S9.E18 march 2016Leonard, Sheldon, and Howard run into problems when they file for a patent for their infinite persistence gyroscope. Meanwhile, the girls give Raj dating advice when Emily reaches out to him after their breakup.
The Solder Excursion Diversion
episode S9.E19 march 2016Amy is shocked at a revelation from Sheldon after she buys him a new laptop. Meanwhile, Raj sells out Leonard and Howard after they lie to their wives in order to attend an early screening of a movie.
The Big Bear Precipitation
episode S9.E20 april 2016Secrets are revealed when Amy and Sheldon join Penny and Leonard on a weekend cabin trip. Raj is more excited about Howard's and Bernadette's impending parenthood than they are.
The Viewing Party Combustion
episode S9.E21 april 2016The gang pick sides when a small argument between Leonard and Sheldon erupts into a heated fight during a "Game of Thrones" viewing party.
The Fermentation Bifurcation
episode S9.E22 april 2016Sheldon and Bernadette spend the evening together while the rest of the gang go to a wine tasting party, but things get uncomfortable for Raj when Penny's ex-boyfriend Zack shows up and takes an interest in Claire.
The Line Substitution Solution
episode S9.E23 may 2016Sheldon hires Stuart to spend the day with Amy when he would rather go to the movies. Meanwhile, Penny struggles to make a connection with Leonard's mother when she comes to visit.
The Convergence Convergence
episode S9.E24 may 2016Leonard and Penny try to have a wedding ceremony that everyone can attend, but it creates serious conflict among Sheldon's mother and Leonard's divorced parents. Meanwhile, Howard and Raj become convinced the government is out to get them.
The Conjugal Conjecture
episode S10.E1 september 2016As Leonard and Penny attempt to hold another wedding ceremony everyone can attend, they have to deal with Penny's family arriving and Leonard's father spending the night with Sheldon's mother.
The Military Miniaturization
episode S10.E2 september 2016Howard is visited by an Air Force colonel regarding his invention. Penny accidentally lets it slip about Bernadette's pregnancy to their co-workers.
The Dependence Transcendence
episode S10.E3 october 2016Bernadette confesses to Raj that she isn't sure if she's ready to be a mother, Penny accompanies Amy to a university mixer, and Sheldon goes to unusual extremes to assist Howard with his military project.
The Cohabitation Experimentation
episode S10.E4 october 2016When Amy must vacate her apartment for repairs, living arrangements are made with Leonard, Sheldon, and Penny. Howard and Bernadette don't want to know the sex of their baby, but Raj finds out.
The Hot Tub Contamination
episode S10.E5 october 2016Sheldon and Amy go through a period of adjustment with their new living arrangement. Howard and Bernadette are forced to vacation at home when she falls ill and keep it a secret, unaware Raj and Stuart planned to use their hot tub.
The Fetal Kick Catalyst
episode S10.E6 october 2016Sheldon and Amy host a brunch. Penny is surprised by her popularity when her movie, "Serial Ape-Ist" is featured at a Van Nuys comic book convention. Howard starts to freak out about parenthood after feeling the baby kick for the first time.
The Veracity Elasticity
episode S10.E7 november 2016Amy doesn't tell Sheldon her apartment has been repaired. Leonard finds out Penny is slowly moving all of his collectible toys into storage.
The Brain Bowl Incubation
episode S10.E8 november 2016A successful gene experimentation leaves Sheldon excited to procreate with Amy, and he pulls out all stops to get her on board. Meanwhile, Raj takes an interest in the cleaning lady at the university.
The Geology Elevation
episode S10.E9 november 2016Sheldon can't contain his jealousy when Bert wins a grant for his geology research. A distasteful toy built by Howard faces judgement from the gang.
The Property Division Collision
episode S10.E10 december 2016Dividing up their possessions becomes an all-out war between Leonard and Sheldon. Stuart asks to live with Howard and Bernadette and tries to supplant Raj's efforts to help with the new baby.
The Birthday Synchronicity
episode S10.E11 december 2016Amy's desire to have an intimate night with Sheldon on her birthday is interrupted by Bernadette going into labor.
The Holiday Summation
episode S10.E12 january 2017After spending the holidays apart, the gang get together to hear about Sheldon's and Amy's trip to Texas, Leonard's and Penny's Christmas tree adventure, and Howard's and Bernadette's first days as parents.
The Romance Recalibration
episode S10.E13 january 2017Leonard and Penny ask for Sheldon's and Amy's help on putting the romance back in their marriage. Howard and Raj go to extreme lengths to stop the floor in Halley's bedroom from making noise.
The Emotion Detection Automation
episode S10.E14 february 2017Penny wants to help her brother get a job with her company. Sheldon learns of a machine that will help him understand human emotions. Raj reunites some of his old girlfriends to figure out why he is still single.
The Locomotion Reverberation
episode S10.E15 february 2017Leonard and Howard's attempt to keep Sheldon away from their Air Force project by sending him on a train trip backfires. Penny and Amy take Bernadette for her first night out since having the baby.
The Allowance Evaporation
episode S10.E16 february 2017Sheldon and Amy have their first fight since moving in together. Meanwhile Raj is shocked at the reality of financial independence when he stops receiving support from his father.
The Comic-Con Conundrum
episode S10.E17 february 2017The guys' annual trip to Comic Con is in doubt when Raj can't afford to go.
The Escape Hatch Identification
episode S10.E18 march 2017When the gang offer places for Raj to live, it creates unexpected conflict among everyone.
The Collaboration Fluctuation
episode S10.E19 march 2017Leonard, Penny and Raj adjust to their new living arrangements; Sheldon expresses an interest in Amy's work.
The Recollection Dissipation
episode S10.E20 april 2017Sheldon reaches his limit when he works on projects with Leonard, Howard and Amy in one day. Bernadette has doubts about leaving Halley when she goes back to work.
The Separation Agitation
episode S10.E21 april 2017Howard and Bernadette have a hard time leaving Halley in daycare when Bernadette returns to work. Bert introduces the gang to his new girlfriend.
The Cognition Regeneration
episode S10.E22 april 2017Leonard is less than thrilled when Penny considers accepting a job offer from her ex-boyfriend, Zack. Sheldon worries that he hasn't reached his full potential soon enough.
The Gyroscopic Collapse
episode S10.E23 may 2017After celebrating the completion of the top-secret Air Force project, Leonard, Sheldon and Howard get an unwelcome surprise; Amy receives an offer for a summer position at Princeton as a visiting researcher.
The Long Distance Dissonance
episode S10.E24 may 2017The gang become concerned when Sheldon's former admirer, Ramona Nowitzki, resurfaces while Amy is away at Princeton.
The Proposal Proposal
episode S11.E1 september 2017Amy has trouble deciding whether or not she should marry Sheldon. Meanwhile, Bernadette confides in Penny when she finds out some huge news.
The Retraction Reaction
episode S11.E2 october 2017Leonard angers the University and the Physics Community when he gives an embarrassing radio interview. Bernadette and Amy compare their successes at work.
The Relaxation Integration
episode S11.E3 october 2017Sheldon and Amy struggle with picking a wedding date. Meanwhile, Stuart and Raj fight over one of Bernadette's co-workers for a date.
The Explosion Implosion
episode S11.E4 october 2017Howard and Bernadette are disappointed when they find out the sex of the baby. Leonard is annoyed when his mother befriends Penny.
The Collaboration Contamination
episode S11.E5 october 2017Amy and Howard work in the lab together causing Sheldon, Bernadette and Raj to feel jealous and lonely. Penny starts using a parenting book to control Sheldon's behavior.
The Proton Regeneration
episode S11.E6 november 2017Sheldon and Wil Wheaton both go head-to-head for the role of the new Professor Proton, Meanwhile Penny takes care of Halley when Bernadette and Howard are on bed rest.
The Geology Methodology
episode S11.E7 november 2017When Bert asks Sheldon to collaborate on a project with him, Sheldon becomes worried about others finding out because he thinks geology is beneath him. Raj seeks advice after reconnecting with Ruchi.
The Tesla Recoil
episode S11.E8 november 2017Howard and Leonard become upset after they discover that Sheldon has been working with the military without telling them; Bernadette asks Raj to investigate her suspicions that Ruchi is attempting to take her job away from her.
The Bitcoin Entanglement
episode S11.E9 november 2017Sheldon tries to teach the other guys a lesson after they cut him out of a potentially valuable Bitcoin investment seven years ago.
The Confidence Erosion
episode S11.E10 december 2017Sheldon and Amy try to eliminate stress from wedding planning by applying math to the process. Raj and Howard come to blows when Raj begins to feel like Howard hurts his confidence.
The Celebration Reverberation
episode S11.E11 december 2017Raj and Howard's feud continues as the gang plan Halley's first birthday party. Sheldon's surprise for Amy's birthday goes awry when they get food poisoning.
The Matrimonial Metric
episode S11.E12 january 2018Sheldon and Amy pick their best-man and maid of honor by experimenting on the gang. Meanwhile, Leonard's self-confidence is still badly damaged after reading his brother's Christmas letter.
The Solo Oscillation
episode S11.E13 january 2018Sheldon kicks Amy out of the apartment to work solo, and she and Leonard end up bonding during a series of science experiments; Howard is replaced by Bert in Footprints on the Moon.
The Separation Triangulation
episode S11.E14 january 2018Raj meets a girl at the Planetarium, but soon after finds out she is married. Sheldon rents out his old room to use for his work.
The Novelization Correlation
episode S11.E15 february 2018Leonard's book raises questions, and Amy guest stars on the new Professor Proton show.
The Neonatal Nomenclature
episode S11.E16 march 2018When Bernadette won't go into labor, the gang try different tactics to get things started. Also, Wolowitz confronts Bernadette after Amy accidentally reveals she's already chosen their son's name.
The Athenaeum Allocation
episode S11.E17 march 2018Leonard jumps through hoops to help secure the perfect wedding venue for Sheldon and Amy. Also, Bernadette and Wolowitz have a hard time deciding who should stay at home with the kids and who should go back to work.
The Gates Excitation
episode S11.E18 march 2018Leonard, Howard and Raj try to meet Bill Gates, who's meeting with Penny to merge their companies; Sheldon thinks he's the victim of an April Fool's prank.
The Tenant Disassociation
episode S11.E19 april 2018Leonard runs against Sheldon to be president of the tenants association; Wolowitz and Koothrappali find a drone in the backyard.
The Reclusive Potential
episode S11.E20 april 2018Sheldon takes the guys to a cabin in the middle of nowhere to meet a reclusive scientist; Penny and Bernadette improvise Amy's bachelorette party.
The Comet Polarization
episode S11.E21 april 2018Sheldon's comic book store experience changes when writer Neil Gaiman puts Stuart's store on the map; friendships are threatened when Koothrappali takes credit for Penny's astronomical discovery.
The Monetary Insufficiency
episode S11.E22 april 2018Sheldon goes to Vegas to win money for science. Also, Penny and Bernadette take Amy wedding dress shopping, but her terrible choice entangles them in a web of lies.
The Sibling Realignment
episode S11.E23 may 2018Sheldon and Leonard make a road trip to wrangle a reluctant wedding guest.
The Bow Tie Asymmetry
episode S11.E24 may 2018When Amy's parents and Sheldon's family arrive, everybody is focused to make sure all wedding arrangements go according to plan - everyone except the bride and groom.
The Conjugal Configuration
episode S12.E1 september 2018After their wedding, Amy and Sheldon go on their honeymoon.
The Wedding Gift Wormhole
episode S12.E2 september 2018Leonard and Penny give Sheldon and Amy a baffling wedding gift.
The Procreation Calculation
episode S12.E3 october 2018The Wolowitzes' life gets complicated when Stuart starts bringing his new girlfriend home. Also, Penny and Leonard talk about starting a family while Koothrappali explores an arranged marriage.
The Tam Turbulence
episode S12.E4 october 2018Sheldon won't tell anyone why he's never mentioned Tam, his childhood best friend, so Leonard takes matters into his own hands. Also, Bernadette and Penny take out Raj's fiancée, Anu, for dinner to get the skinny on her.
The Planetarium Collision
episode S12.E5 october 2018Amy doesn't have time to work with Sheldon on super asymmetry, so he goes to great lengths to ensure she's available. Koothrappali doesn't want Wolowitz to join him in hosting a show at the planetarium.
The Imitation Perturbation
episode S12.E6 october 2018When Wolowitz dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny's Halloween party. Also, Leonard is shocked that Penny doesn't remember their first kiss.
The Grant Allocation Derivation
episode S12.E7 november 2018Leonard is caught between a rock and a hard place when he's responsible for distributing extra grant money. Also, Bernadette turns the backyard playhouse into a hideaway from her husband and kids.
The Consummation Deviation
episode S12.E8 november 2018Sheldon tries to bond with Amy's father, but when Wolowitz lures Mr. Fowler away with magic tricks, Sheldon has no choice but to bond with Mrs. Fowler. Also, Koothrappali and Anu try to get physical for the first time.
The Citation Negation
episode S12.E9 november 2018Sheldon and Amy are devastated after learning from a Russian paper that super asymmetry has already been theorized and disproved. Bernadette wants to beat Howard in a popular video game.
The VCR Illumination
episode S12.E10 december 2018A VHS tape from Sheldon's past inspires him and Amy not to give up when they're still feeling down about their theory being disproven. Bernadette turns into a pageant mom when she tries to help Howard with his Magic Castle audition.
The Paintball Scattering
episode S12.E11 january 2019Penny and Leonard organize a paintball game, which results in mayhem when Sheldon becomes jealous of Amy. Raj catches Anu with her ex-boyfriend. Stuart doesn't want to move in with Denise.
The Propagation Proposition
episode S12.E12 january 2019Penny's ex-boyfriend Zack learns that he is infertile, so he asks Leonard for help; Koothrappali attempts to mend things with his ex-fiancee Anu.
The Confirmation Polarization
episode S12.E13 january 2019Sheldon and Amy are thrilled when their super asymmetry theory is proven by two physicists, until they try to kick Amy off the Nobel nomination. Bernadette gets one of her drugs approved and wants a reluctant Penny to head the sales team.
The Meteorite Manifestation
episode S12.E14 january 2019Sheldon is thrilled to help Bernadette and Howard navigate bureaucracy concerning a neighbor's non-compliant balcony until he learns they too have ignored codes. Leonard is disappointed when his friends are uninterested in his new laser.
The Donation Oscillation
episode S12.E15 february 2019Penny tries to throw a wrench into Leonard's plan to be a sperm donor for her ex-boyfriend; Wolowitz, Bernadette, Anu and Koothrappali turn Koothrappali's canceled bachelor party into a couple's trip aboard the "vomit comet."
The D & D Vortex
episode S12.E16 february 2019The gang finds out Wil Wheaton hosts a celebrity Dungeons and Dragons game involving William Shatner, Joe Manganiello, Kareem Abdul-Jabbar and Kevin Smith. Deception and betrayal are the path to make it to the one open seat.
The Conference Valuation
episode S12.E17 march 2019Bernadette and Penny travel to San Diego for a pharmaceutical sales convention. Back home, Amy and the guys experiment on the Wolowitz children when Sheldon finds a book on it.
The Laureate Accumulation
episode S12.E18 april 2019Rivals Pemberton and Campbell charm America on a publicity tour so Sheldon and Amy try to win over Nobel laureates Kip Thorne, George Smoot and Frances Arnold. Halley's fear of the dark causes opportunity and conflict at the Wolowitz home.
The Inspiration Deprivation
episode S12.E19 april 2019Contemplating what it would mean to all women if she were to win a Nobel Prize causes Amy to have a meltdown. Koothrappali and Wolowitz try to relive the good old days after Wolowitz buys a scooter that looks like the one he had years ago.
The Decision Reverberation
episode S12.E20 april 2019Koothrappali is worried people won't take him seriously in his own field after publishing a paper that suggests he may have discovered alien life. Leonard wants to be the principal investigator on a plasma physics study.
The Plagiarism Schism
episode S12.E21 may 2019Kripke has proof that Dr. Pemberton plagiarized his thesis in college, and Sheldon and Amy aren't sure if they should turn him in. Wolowitz learns that Bernadette wasn't the only waitress at the Cheesecake Factory who had a crush on him.
The Maternal Conclusion
episode S12.E22 may 2019Leonard is pleasantly surprised when Beverly comes to visit and she's genuinely kind to him, until he finds out the real reason she's there. Also, Denise and Stuart overstay their welcome at the Wolowitz house.
The Change Constant
episode S12.E23 may 2019Sheldon and Amy await big news.
The Stockholm Syndrome
episode S12.E24 may 2019Bernadette and Wolowitz leave their kids for the first time; Penny and Leonard try to keep a secret; Sheldon and Amy stick together; and Koothrappali makes a new friend, as the gang travels together into an uncharted future.
- Pilot
- The Big Bran Hypothesis
- The Fuzzy Boots Corollary
- The Luminous Fish Effect
- The Hamburger Postulate
- The Middle Earth Paradigm
- The Dumpling Paradox
- The Grasshopper Experiment
- The Cooper-Hofstadter Polarization
- The Loobenfeld Decay
- The Pancake Batter Anomaly
- The Jerusalem Duality
- The Bat Jar Conjecture
- The Nerdvana Annihilation
- The Pork Chop Indeterminacy
- The Peanut Reaction
- The Tangerine Factor
- The Bad Fish Paradigm
- The Codpiece Topology
- The Barbarian Sublimation
- The Griffin Equivalency
- The Euclid Alternative
- The Cooper-Nowitzki Theorem
- The Panty Piñata Polarization
- The Lizard-Spock Expansion
- The White Asparagus Triangulation
- The Vartabedian Conundrum
- The Bath Item Gift Hypothesis
- The Killer Robot Instability
- The Friendship Algorithm
- The Financial Permeability
- The Maternal Capacitance
- The Cushion Saturation
- The Terminator Decoupling
- The Work Song Nanocluster
- The Dead Hooker Juxtaposition
- The Hofstadter Isotope
- The Vegas Renormalization
- The Classified Materials Turbulence
- The Monopolar Expedition
- The Electric Can Opener Fluctuation
- The Jiminy Conjecture
- The Gothowitz Deviation
- The Pirate Solution
- The Creepy Candy Coating Corollary
- The Cornhusker Vortex
- The Guitarist Amplification
- The Adhesive Duck Deficiency
- The Vengeance Formulation
- The Gorilla Experiment
- The Maternal Congruence
- The Psychic Vortex
- The Bozeman Reaction
- The Einstein Approximation
- The Large Hadron Collision
- The Excelsior Acquisition
- The Precious Fragmentation
- The Pants Alternative
- The Wheaton Recurrence
- The Spaghetti Catalyst
- The Plimpton Stimulation
- The Staircase Implementation
- The Lunar Excitation
- The Robotic Manipulation
- The Cruciferous Vegetable Amplification
- The Zazzy Substitution
- The Hot Troll Deviation
- The Desperation Emanation
- The Irish Pub Formulation
- The Apology Insufficiency
- The 21-Second Excitation
- The Boyfriend Complexity
- The Alien Parasite Hypothesis
- The Justice League Recombination
- The Bus Pants Utilization
- The Love Car Displacement
- The Thespian Catalyst
- The Benefactor Factor
- The Cohabitation Formulation
- The Toast Derivation
- The Prestidigitation Approximation
- The Zarnecki Incursion
- The Herb Garden Germination
- The Agreement Dissection
- The Wildebeest Implementation
- The Engagement Reaction
- The Roommate Transmogrification
- The Skank Reflex Analysis
- The Infestation Hypothesis
- The Pulled Groin Extrapolation
- The Wiggly Finger Catalyst
- The Russian Rocket Reaction
- The Rhinitis Revelation
- The Good Guy Fluctuation
- The Isolation Permutation
- The Ornithophobia Diffusion
- The Flaming Spittoon Acquisition
- The Speckerman Recurrence
- The Shiny Trinket Maneuver
- The Recombination Hypothesis
- The Beta Test Initiation
- The Friendship Contraction
- The Vacation Solution
- The Rothman Disintegration
- The Werewolf Transformation
- The Weekend Vortex
- The Transporter Malfunction
- The Hawking Excitation
- The Stag Convergence
- The Launch Acceleration
- The Countdown Reflection
- The Date Night Variable
- The Decoupling Fluctuation
- The Higgs Boson Observation
- The Re-Entry Minimization
- The Holographic Excitation
- The Extract Obliteration
- The Habitation Configuration
- The 43 Peculiarity
- The Parking Spot Escalation
- The Fish Guts Displacement
- The Santa Simulation
- The Egg Salad Equivalency
- The Bakersfield Expedition
- The Cooper/Kripke Inversion
- The Spoiler Alert Segmentation
- The Tangible Affection Proof
- The Monster Isolation
- The Contractual Obligation Implementation
- The Closet Reconfiguration
- The Tenure Turbulence
- The Closure Alternative
- The Proton Resurgence
- The Love Spell Potential
- The Bon Voyage Reaction
- The Hofstadter Insufficiency
- The Deception Verification
- The Scavenger Vortex
- The Raiders Minimization
- The Workplace Proximity
- The Romance Resonance
- The Proton Displacement
- The Itchy Brain Simulation
- The Thanksgiving Decoupling
- The Discovery Dissipation
- The Cooper Extraction
- The Hesitation Ramification
- The Occupation Recalibration
- The Convention Conundrum
- The Locomotive Manipulation
- The Table Polarization
- The Friendship Turbulence
- The Mommy Observation
- The Indecision Amalgamation
- The Relationship Diremption
- The Anything Can Happen Recurrence
- The Proton Transmogrification
- The Gorilla Dissolution
- The Status Quo Combustion
- The Locomotion Interruption
- The Junior Professor Solution
- The First Pitch Insufficiency
- The Hook-up Reverberation
- The Focus Attenuation
- The Expedition Approximation
- The Misinterpretation Agitation
- The Prom Equivalency
- The Septum Deviation
- The Champagne Reflection
- The Clean Room Infiltration
- The Space Probe Disintegration
- The Anxiety Optimization
- The Troll Manifestation
- The Comic Book Store Regeneration
- The Intimacy Acceleration
- The Colonization Application
- The Leftover Thermalization
- The Skywalker Incursion
- The Fortification Implementation
- The Communication Deterioration
- The Graduation Transmission
- The Maternal Combustion
- The Commitment Determination
- The Matrimonial Momentum
- The Separation Oscillation
- The Bachelor Party Corrosion
- The 2003 Approximation
- The Perspiration Implementation
- The Helium Insufficiency
- The Spock Resonance
- The Mystery Date Observation
- The Platonic Permutation
- The Earworm Reverberation
- The Opening Night Excitation
- The Sales Call Sublimation
- The Empathy Optimization
- The Meemaw Materialization
- The Valentino Submergence
- The Positive Negative Reaction
- The Celebration Experimentation
- The Application Deterioration
- The Solder Excursion Diversion
- The Big Bear Precipitation
- The Viewing Party Combustion
- The Fermentation Bifurcation
- The Line Substitution Solution
- The Convergence Convergence
- The Conjugal Conjecture
- The Military Miniaturization
- The Dependence Transcendence
- The Cohabitation Experimentation
- The Hot Tub Contamination
- The Fetal Kick Catalyst
- The Veracity Elasticity
- The Brain Bowl Incubation
- The Geology Elevation
- The Property Division Collision
- The Birthday Synchronicity
- The Holiday Summation
- The Romance Recalibration
- The Emotion Detection Automation
- The Locomotion Reverberation
- The Allowance Evaporation
- The Comic-Con Conundrum
- The Escape Hatch Identification
- The Collaboration Fluctuation
- The Recollection Dissipation
- The Separation Agitation
- The Cognition Regeneration
- The Gyroscopic Collapse
- The Long Distance Dissonance
- The Proposal Proposal
- The Retraction Reaction
- The Relaxation Integration
- The Explosion Implosion
- The Collaboration Contamination
- The Proton Regeneration
- The Geology Methodology
- The Tesla Recoil
- The Bitcoin Entanglement
- The Confidence Erosion
- The Celebration Reverberation
- The Matrimonial Metric
- The Solo Oscillation
- The Separation Triangulation
- The Novelization Correlation
- The Neonatal Nomenclature
- The Athenaeum Allocation
- The Gates Excitation
- The Tenant Disassociation
- The Reclusive Potential
- The Comet Polarization
- The Monetary Insufficiency
- The Sibling Realignment
- The Bow Tie Asymmetry
- The Conjugal Configuration
- The Wedding Gift Wormhole
- The Procreation Calculation
- The Tam Turbulence
- The Planetarium Collision
- The Imitation Perturbation
- The Grant Allocation Derivation
- The Consummation Deviation
- The Citation Negation
- The VCR Illumination
- The Paintball Scattering
- The Propagation Proposition
- The Confirmation Polarization
- The Meteorite Manifestation
- The Donation Oscillation
- The D & D Vortex
- The Conference Valuation
- The Laureate Accumulation
- The Inspiration Deprivation
- The Decision Reverberation
- The Plagiarism Schism
- The Maternal Conclusion
- The Change Constant
- The Stockholm Syndrome
Best moments10
- Penny becomes jealous when a gorgeous new neighbor attracts the guys' attention.
- The guys go all out to help Sheldon find the person responsible for hacking his online gaming account, while the girls' hatred for Priya increases.
- Sheldon kicks Amy out of the apartment to work solo, and she and Leonard end up bonding during a series of science experiments; Howard is replaced by Bert in Footprints on the Moon.
- Leonard's mother makes a visit to his dismay and Sheldon's delight.
- Sheldon introduces Penny to online gaming, however she refuses to quit after becoming addicted.
- Penny gets fired from her movie and takes a serious look at her life. Raj sees Emily on a date with another man at the movies. Howard and Bernadette have to take care of his mother after she breaks her leg.
- Sheldon hires Stuart to spend the day with Amy when he would rather go to the movies. Meanwhile, Penny struggles to make a connection with Leonard's mother when she comes to visit.
- Penny enrolls in a college class and keeps it a secret from Leonard. Sheldon causes conflict with Dr. Stephen Hawking over an online game.
- Sheldon and Wil Wheaton both go head-to-head for the role of the new Professor Proton, Meanwhile Penny takes care of Halley when Bernadette and Howard are on bed rest.
- Sheldon gets mad at Amy for ruining one of his favorite movies, Raj and Stuart try to make their online dating profiles more appealing, and Leonard tries to play the sympathy card with Penny.
- The Dead Hooker Juxtaposition
- The Zarnecki Incursion
- The Solo Oscillation
- The Maternal Congruence
- The Barbarian Sublimation
- The Gorilla Dissolution
- The Line Substitution Solution
- The Extract Obliteration
- The Proton Regeneration
- The Raiders Minimization