The Big Bang Theory

1. S01E01PilotSeptember 24, 2007 7.8Is a comedy about brilliant physicists, Leonard and Sheldon, who are the kind of "beautiful minds" that understand how the universe works. B
2. S01E02The Big Bran HypothesisOctober 1, 2007 8.1Leonard volunteers to sign for a package, hoping to make a good impression on Penny. When he enlists the help of his obsessive-compulsive ro
3. S01E03The Fuzzy Boots CorollaryOctober 8, 2007 7.8Leonard is bummed to learn that his crush, Penny, is seeing someone, so encouraged by his friends and fellow scientists, Leonard actually su
4. S01E04The Luminous Fish EffectOctober 15, 2007 8.2When Sheldon gets fired, he explores life beyond physics, but his initial thrill of shopping with Penny devolves over time to him weaving po
5. S01E05The Hamburger PostulateOctober 22, 2007 8.0After sensing his pursuit of Penny isn't going anywhere, Leonard agrees to an unexpected sexual encounter with fellow scientist Leslie Winkl
6. S01E06The Middle-Earth ParadigmOctober 29, 2007 8.2Leonard, Sheldon, Wolowitz and Koothrappali undertake a challenging and risky experiment-attending the Halloween party being thrown by their
7. S01E07The Dumpling ParadoxNovember 5, 2007 8.1When Wolowitz seduces Penny's friend and takes over her apartment, Penny sleeps on Leonard and Sheldon's couch. With Wolowitz preoccupied, t
8. S01E08The Grasshopper ExperimentNovember 12, 2007 8.2Koothrappali is overwhelmed after his parents arrange a blind date, but he discovers he actually can talk to the opposite sex after a few dr
9. S01E09The Cooper-Hofstadter PolarizationMarch 17, 2008 8.1When Sheldon and Leonard are invited to present their joint findings at a physics conference, Sheldon refuses, and Penny steps in to mediate
10. S01E10The Loobenfeld DecayMarch 24, 2008 7.9After hearing Penny sing, Leonard lies to avoid seeing her perform, but Sheldon takes it one step further with a more elaborate lie that lea
11. S01E11The Pancake Batter AnomalyMarch 31, 2008 8.1When Sheldon gets sick, Leonard and the boys know what's in store and avoid him like the plague, leaving an unsuspecting Penny to nurse the
12. S01E12The Jerusalem DualityApril 14, 2008 7.9When Leonard and Sheldon meet a 15-year-old physics prodigy, Sheldon is distraught that this boy genius is younger and smarter, so in an att
13. S01E13The Bat Jar ConjectureApril 21, 2008 8.0Since Sheldon's only focus is to prove his mental superiority while preparing for the Physics Bowl, the guys kick him off the team and enlis
14. S01E14The Nerdvana AnnihilationApril 28, 2008 8.2When Leonard and the guys buy a time machine prop from a classic 1960 movie, its arrival creates problems for Penny and she tells the boys t
15. S01E15Season's bestThe Pork Chop IndeterminacyMay 5, 2008 8.3When Leonard, Wolowitz, and Koothrappali all become smitten with Sheldon's twin sister, Leonard devises a plan to eliminate his rivals, howe
16. S01E16The Peanut ReactionMay 12, 2008 8.3When Penny learns that Leonard doesn't celebrate birthdays, she attempts to throw him a surprise party, but is sidetracked by Sheldon who un
17. S01E17The Tangerine FactorMay 19, 2008 8.3When Leonard asks Penny out on a date and she says yes, they each seek the "wisdom" of reluctant advisor.

Season 1 ranked & reviewed

1. S02E01The Bad Fish ParadigmSeptember 22, 2008 8.2After her first date with Leonard goes awry, Penny finds an unwilling confidant in Leonard's anti-social roommate, Sheldon.
2. S02E02The Codpiece TopologySeptember 29, 2008 7.9When Leonard sees Penny with a handsome new guy, he enters into a rebound relationship with Sheldon's nemesis, Leslie Winkle.
3. S02E03The Barbarian SublimationOctober 6, 2008 8.5Sheldon creates a monster when he introduces Penny to the world of online gaming.
4. S02E04The Griffin EquivalencyOctober 13, 2008 8.0Raj, newly famous because of an article in a magazine, gets a big head and makes a disastrous play for Leonard's crush, Penny.
5. S02E05The Euclid AlternativeOctober 20, 2008 8.4Leonard and his friends stage an intervention to make Sheldon confront his longstanding fear of driving.
6. S02E06The Cooper-Nowitzki TheoremNovember 3, 2008 8.4Young grad student's attraction to Sheldon confuses everyone, including Sheldon himself.
7. S02E07The Panty Piñata PolarizationNovember 10, 2008 8.3Penny vows to get revenge on Sheldon when he bans her from the apartment for a series of petty infractions.
8. S02E08The Lizard-Spock ExpansionNovember 17, 2008 8.1Wolowitz thinks he's found the love of his life, until she meets Leonard.
9. S02E09The White Asparagus TriangulationNovember 24, 2008 7.9Sheldon can barely contain his joy when Leonard starts dating a woman who meets Sheldon's exacting standards.
10. S02E10The Vartabedian ConundrumDecember 8, 2008 7.8When Leonard's relationship with a new woman starts moving too fast, he goes to Penny for advice.
11. S02E11Season's bestThe Bath Item Gift HypothesisDecember 15, 2008 8.8Christmas is a source of stress for Leonard - whose handsome colleague starts dating Penny - and his friends, who are being tormented by She
12. S02E12The Killer Robot InstabilityJanuary 12, 2009 7.9When Penny's comment about Wolowitz's love life sends him into a depressed stupor, his friends lose their most important team-mate in an upc
13. S02E13The Friendship AlgorithmJanuary 19, 2009 8.1Socially awkward Sheldon develops a scientific procedure for making friends.
14. S02E14The Financial PermeabilityFebruary 2, 2009 7.9Sheldon's "simple" solution to Penny's financial problem leads to a confrontation between Leonard and Penny's hulking ex-boyfriend, Kurt.
15. S02E15The Maternal CapacitanceFebruary 9, 2009 8.7Disastrous visit from Mrs. Hofstadter brings Leonard and Penny closer together.
16. S02E16The Cushion SaturationMarch 2, 2009 8.2Paintball game leads to a fight between Penny and Sheldon, and romance for Wolowitz and Leslie.
17. S02E17The Terminator DecouplingMarch 9, 2009 8.2Train trip to San Francisco takes a major detour when Leonard, Sheldon, Wolowitz and Raj discover that beautiful sci-fi actress Summer Glau
18. S02E18The Work Song NanoclusterMarch 16, 2009 8.3Penny's home hair products business becomes a complete nightmare when a caffeine-addled Sheldon takes over.
19. S02E19The Dead Hooker JuxtapositionMarch 30, 2009 8.2Penny develops a rivalry with a sexy female neighbor who threatens to become "The New Penny" in the building.
20. S02E20The Hofstadter IsotopeApril 13, 2009 8.1While a fellow comic book-loving pal of the guys romances Penny, Leonard and Wolowitz venture out into the world of "Ladies' Night" at a loc
21. S02E21The Vegas RenormalizationApril 27, 2009 8.3Leonard and Koothrappali take a heartbroken Wolowitz to Las Vegas, leaving Sheldon locked out of his apartment and forced to bunk with Penny
22. S02E22The Classified Materials TurbulenceMay 4, 2009 8.1Things begin to look up for Leonard when Penny makes a surprising revelation on her second date with Stuart. Meanwhile, Wolowitz enlists his
23. S02E23The Monopolar ExpeditionMay 11, 2009 8.5Penny is conflicted when Leonard and his friends decide to spend the summer working - at the North Pole.

Season 2 ranked & reviewed

1. S03E01The Electric Can Opener FluctuationSeptember 21, 2009 8.0Sheldon flees back to Texas in disgrace when he learns the guys tampered with his arctic expedition data, forcing the guys to follow him and
2. S03E02The Jiminy ConjectureSeptember 28, 2009 7.9Leonard and Penny struggle to recover from an awkward first hookup while Sheldon and Howard stake their best comic books on a bet to determi
3. S03E03The Gothowitz DeviationOctober 5, 2009 8.2Howard and Raj visit a Goth nightclub to pick up women while Sheldon attempts to build a better Penny using chocolate-based behavior modific
4. S03E04The Pirate SolutionOctober 12, 2009 8.2Raj must find a new job or be sent back to India, but Sheldon has a solution, which leaves Leonard and Penny dealing with Howard as third wh
5. S03E05The Creepy Candy Coating CorollaryOctober 19, 2009 8.2While Sheldon settles a score with his nemesis, Wil Wheaton, Wolowitz begs Leonard to get Penny to set him up with one of her friends.
6. S03E06The Cornhusker VortexNovember 2, 2009 7.5Sheldon teaches Leonard how to understand football while a kite-fighting incident threatens Howard and Raj's friendship.
7. S03E07The Guitarist AmplificationNovember 9, 2009 8.1An argument between Leonard and Penny proves "inconvenient" to Sheldon.
8. S03E08The Adhesive Duck DeficiencyNovember 16, 2009 8.6With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on.
9. S03E09The Vengeance FormulationNovember 23, 2009 8.2After he's humiliated on National Public Radio, Sheldon vows to destroy Kripke, while Wolowitz tries not to destroy his new relationship wit
10. S03E10The Gorilla ExperimentDecember 7, 2009 8.2Sheldon attempts to help Penny understand Leonard's work, and Wolowitz becomes jealous when Leonard starts hanging out with his new girlfrie
11. S03E11The Maternal CongruenceDecember 14, 2009 8.3Visit from Leonard's mother delights Sheldon and horrifies Leonard.
12. S03E12The Psychic VortexJanuary 11, 2010 8.3While Sheldon and Koothrappali attend a university mixer, Leonard is upset to discover that Penny believes in psychics.
13. S03E13The Bozeman ReactionJanuary 18, 2010 8.3When their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system.
14. S03E14The Einstein ApproximationFebruary 1, 2010 8.4Sheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny.
15. S03E15The Large Hadron CollisionFebruary 8, 2010 8.2Leonard can only bring one guest on a trip to see CERN's Large Hadron Collider in Switzerland on Valentine's Day.
16. S03E16The Excelsior AcquisitionMarch 1, 2010 8.3Sheldon winds up in traffic court when he gets a ticket because of Penny.
17. S03E17Season's bestThe Precious FragmentationMarch 8, 2010 8.7When the guys find a ring from "The Lord of the Rings" at a garage sale, it threatens to tear them apart.
18. S03E18The Pants AlternativeMarch 22, 2010 8.5Sheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award.
19. S03E19The Wheaton RecurrenceApril 12, 2010 7.7Fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling.
20. S03E20The Spaghetti CatalystMay 3, 2010 8.1When Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy.
21. S03E21The Plimpton StimulationMay 10, 2010 8.4Leonard and Sheldon compete for the attention of a famous female physicist.
22. S03E22The Staircase ImplementationMay 17, 2010 8.7Leonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator.
23. S03E23The Lunar ExcitationMay 24, 2010 8.5While Penny worries that dating Leonard has ruined her for normal guys, Wolowitz and Koothrappali search for Sheldon's perfect match online.

Season 3 ranked & reviewed

1. S04E01The Robotic ManipulationSeptember 23, 2010 8.4Penny finds herself along for the ride on Sheldon's first date ever; while Wolowitz finds a new use for a robotic arm.
2. S04E02The Cruciferous Vegetable AmplificationSeptember 30, 2010 8.4Sheldon realizes he won't live long enough to download his consciousness into a robot body, and attempts to extend his lifespan.
3. S04E03The Zazzy SubstitutionOctober 7, 2010 8.1The guys are concerned as Sheldon searches for an alternative to human companionship.
4. S04E04The Hot Troll DeviationOctober 14, 2010 8.2An embarrassing secret of Wolowitz's comes to light, while Sheldon and Raj have a small war at work.
5. S04E05The Desperation EmanationOctober 21, 2010 7.8Leonard realizes he's the only one without a girlfriend, while Sheldon wants to get rid of his.
6. S04E06The Irish Pub FormulationOctober 28, 2010 7.9Leonard keeps an affair secret from Sheldon, Howard and Raj.
7. S04E07The Apology InsufficiencyNovember 4, 2010 8.1Sheldon's answers during an FBI interview put Wolowitz's security clearance in jeopardy.
8. S04E08The 21-Second ExcitationNovember 11, 2010 8.4While the guys camp in line for a screening, Penny and Bernadette invite Amy to her first slumber party.
9. S04E09The Boyfriend ComplexityNovember 18, 2010 8.5Penny asks Leonard to lie to her father, while Howard, Raj and Bernadette pull an all-nighter at a telescope.
10. S04E10The Alien Parasite HypothesisDecember 9, 2010 7.8Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero.
11. S04E11The Justice League RecombinationDecember 16, 2010 8.6The guys find a "super" use for Penny's new boyfriend, Zack, when they enter a costume contest as the Justice League.
12. S04E12The Bus Pants UtilizationJanuary 6, 2011 7.3Leonard's idea for a smartphone app derails his friendship with Sheldon.
13. S04E13The Love Car DisplacementJanuary 20, 2011 8.3Tension runs high when everyone is staying at the same hotel for a science event and Bernadette runs into her ex-boyfriend.
14. S04E14The Thespian CatalystFebruary 3, 2011 7.6Sheldon hopes acting lessons from Penny will help him become a better teacher. Meanwhile, Koothrappali fantasizes about his best friend's gi
15. S04E15The Benefactor FactorFebruary 10, 2011 7.9A wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science.
16. S04E16The Cohabitation FormulationFebruary 17, 2011 8.0As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj's sister.
17. S04E17The Toast DerivationFebruary 24, 2011 7.8Sheldon struggles to cope when he realizes it's actually Leonard who is the center of their social group.
18. S04E18The Prestidigitation ApproximationMarch 10, 2011 8.4Leonard must choose between new girlfriend Priya and his friendship with Penny. Meanwhile, Howard drives Sheldon crazy with a magic trick.
19. S04E19The Zarnecki IncursionMarch 31, 2011 8.1When someone hacks Sheldon's online game account, the guys go on a quest to find the culprit.
20. S04E20The Herb Garden GerminationApril 7, 2011 8.3Sheldon and Amy experiment on their friends by spreading gossip, while Howard takes a big step in his relationship with Bernadette.
21. S04E21The Agreement DissectionApril 28, 2011 8.4When Priya uses her lawyer skills to pick apart the roommate agreement, the girls take Sheldon dancing.
22. S04E22The Wildebeest ImplementationMay 5, 2011 7.9Raj attempts to cure his social anxiety disorder while Penny uses Bernadette to spy on Leonard and his girlfriend.
23. S04E23The Engagement ReactionMay 12, 2011 8.0When Howard finally breaks the news to his mom that he's engaged to Bernadette, it lands her in the hospital.
24. S04E24Season's bestThe Roommate TransmogrificationMay 19, 2011 8.7When Bernadette receives her Ph.D., the guys take joy in reminding an emasculated Wolowitz that he is the only one in their group who isn't

Season 4 ranked & reviewed

1. S05E01The Skank Reflex AnalysisSeptember 22, 2011 7.8Penny worries that she's screwed things up permanently with her friends, while Sheldon takes command of the paintball team.
2. S05E02The Infestation HypothesisSeptember 22, 2011 7.8Fight between Sheldon and Penny leaves Amy caught in the middle, while Leonard tries to spice up his long-distance relationship with Priya.
3. S05E03The Pulled Groin ExtrapolationSeptember 29, 2011 7.7Leonard and Amy get to know each other better, while Howard and Bernadette spend the weekend with Mrs. Wolowitz.
4. S05E04The Wiggly Finger CatalystOctober 6, 2011 7.7Raj finally meets a girl he can communicate with.
5. S05E05The Russian Rocket ReactionOctober 13, 2011 7.7Sheldon and Leonard get invited to a party at Wil Wheaton's house, and Howard gets an out-of-this-world opportunity.
6. S05E06The Rhinitis RevelationOctober 20, 2011 7.4Sheldon competes with the gang for his mother's attention when she comes to visit.
7. S05E07Season's bestThe Good Guy FluctuationOctober 27, 2011 8.2Cute comic book artist puts Leonard and Priya's relationship to the test, while Sheldon tries to scare the guys for Halloween.
8. S05E08The Isolation PermutationNovember 3, 2011 7.5Amy is crushed when Bernadette and Penny go shopping for wedding dresses without her.
9. S05E09The Ornithophobia DiffusionNovember 10, 2011 7.6Leonard and Penny try hanging out alone, and Sheldon must overcome his fear of birds.
10. S05E10The Flaming Spittoon AcquisitionNovember 17, 2011 7.4Sheldon considers taking his relationship with Amy to the next level when Stuart from the comic book store asks her out on a date.
11. S05E11The Speckerman RecurrenceDecember 8, 2011 7.0Leonard must face his fears after being contacted by his high school tormentor.
12. S05E12The Shiny Trinket ManeuverJanuary 12, 2012 7.6Sheldon gets in trouble with Amy when he isn't impressed by her recent accomplishment, and Howard must come to grips with Bernadette's disli
13. S05E13The Recombination HypothesisJanuary 19, 2012 7.9Everything might change when Leonard offers Penny a spur of the moment invitation to a romantic dinner for two.
14. S05E14The Beta Test InitiationJanuary 26, 2012 7.9Leonard and Penny experiment with dating, while Raj develops a peculiar relationship with his phone's virtual assistant.
15. S05E15The Friendship ContractionFebruary 2, 2012 7.5Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Wolowitz tries to pick his astronaut nickname.
16. S05E16The Vacation SolutionFebruary 9, 2012 7.5When Sheldon is forced to take his vacation, he goes to work with Amy in her neurobiology lab. Meanwhile, Bernadette wants Howard to sign a
17. S05E17The Rothman DisintegrationFebruary 16, 2012 7.4When an office at the University opens up, Sheldon must compete for it with his archenemy, Kripke. Meanwhile, a gift from Amy makes Penny un
18. S05E18The Werewolf TransformationFebruary 23, 2012 7.6Sheldon's life is turned upside-down after his barber gets sick. Meanwhile, astronaut training causes Wolowitz to rethink his decision to go
19. S05E19The Weekend VortexMarch 8, 2012 7.7Sheldon chooses to play video games with the guys rather than go with Amy to her aunt's birthday party.
20. S05E20The Transporter MalfunctionMarch 29, 2012 7.5Penny buys Leonard and Sheldon "Star Trek" collectibles as a thank-you, leading Sheldon to be haunted by Mr. Spock. Meanwhile, Raj decides h
21. S05E21The Hawking ExcitationApril 5, 2012 7.9When Wolowitz gets to work with Stephen Hawking, Sheldon is willing to do anything to meet his hero.
22. S05E22The Stag ConvergenceApril 26, 2012 8.0Bernadette reconsiders marrying Howard after learning about his sexual history.
23. S05E23The Launch AccelerationMay 3, 2012 8.1NASA reschedules Howard's mission, putting his and Bernadette's wedding plans in jeopardy. Meanwhile, Leonard says something surprising to P
24. S05E24The Countdown ReflectionMay 10, 2012 8.0When Howard and Bernadette decide they want to be married before his NASA launch, the gang rushes to put on a wedding.

Season 5 ranked & reviewed

1. S06E01The Date Night VariableSeptember 27, 2012 7.2With his friends on dates, Raj must face his loneliness. Also, Wolowitz is caught in an argument between Bernadette and his mom, even while
2. S06E02The Decoupling FluctuationOctober 4, 2012 7.4When Sheldon learns that Penny is thinking about breaking up with Leonard, he tries to intervene. Meanwhile, in space, the other astronauts
3. S06E03The Higgs Boson ObservationOctober 11, 2012 7.6Amy feels threatened when Sheldon hires a young female assistant, and the pressure of being in space takes its toll on Wolowitz.
4. S06E04The Re-Entry MinimizationOctober 18, 2012 7.9When Wolowitz returns from space, he doesn't get the hero's welcome he expected. Meanwhile, Game Night turns into a battle of the sexes.
5. S06E05The Holographic ExcitationOctober 25, 2012 7.7The gang celebrates Halloween at Stuart's comic book store. Meanwhile, Leonard seduces Penny with science.
6. S06E06The Extract ObliterationNovember 1, 2012 7.6Sheldon's relationship with Stephen Hawking is threatened over a game of "Words with Friends," and Penny secretly enrolls in a class at the
7. S06E07The Habitation ConfigurationNovember 8, 2012 7.5Wolowitz struggles with moving out of his mother's house. Meanwhile, Sheldon is caught in the middle of an argument between Amy and Wil Whea
8. S06E08The 43 PeculiarityNovember 15, 2012 8.0Howard and Raj try to get to the bottom of why Sheldon disappears every afternoon at 2:45. Meanwhile, Leonard and Penny deal with jealousy i
9. S06E09The Parking Spot EscalationNovember 29, 2012 8.1When the University reassigns Sheldon's parking spot to Wolowitz, their fight affects the whole gang.
10. S06E10The Fish Guts DisplacementDecember 6, 2012 8.0Sheldon tries to nurse a sick Amy back to health, while Wolowitz prepares for an upcoming fishing trip with his father-in-law.
11. S06E11The Santa SimulationDecember 13, 2012 7.9Sheldon revisits some Christmas memories during a game of Dungeons and Dragons, while Penny, Bernadette and Amy try to find a girl for Kooth
12. S06E12The Egg Salad EquivalencyJanuary 3, 2013 8.1Sheldon gets accused of sexual harassment at the University and winds up getting Leonard, Raj and Wolowitz in trouble.
13. S06E13The Bakersfield ExpeditionJanuary 10, 2013 8.1While the guys take a road trip to a comic book convention dressed as "Star Trek: The Next Generation" characters, the girls stay home and t
14. S06E14The Cooper/Kripke InversionJanuary 31, 2013 7.6Sheldon is forced to work with Barry Kripke and faces a crisis of confidence. Meanwhile, Howard and Raj spend $1,000 on action figures of th
15. S06E15Season's bestThe Spoiler Alert SegmentationFebruary 7, 2013 8.2When Sheldon and Leonard fight, it affects Penny and Amy's living arrangements. Meanwhile, Raj takes care of Mrs. Wolowitz while Howard is a
16. S06E16The Tangible Affection ProofFebruary 14, 2013 7.5While the guys try to give their significant others the perfect Valentine's Day, Raj and Stuart throw a "lonely people" party at the comic b
17. S06E17The Monster IsolationFebruary 21, 2013 7.5After a terrible date, Koothrappali vows to never leave his apartment. Meanwhile, Penny actually impresses Sheldon with her acting skills.
18. S06E18The Contractual Obligation ImplementationMarch 7, 2013 7.7Leonard, Sheldon and Wolowitz speak to junior high girls about careers in science. Meanwhile, Koothrappali plans a date with Lucy.
19. S06E19The Closet ReconfigurationMarch 14, 2013 7.5Howard struggles with whether or not he should open a letter from his father, and Leonard and Penny throw a "grown-up" cocktail party at the
20. S06E20The Tenure TurbulenceApril 4, 2013 7.6Leonard, Sheldon and Raj fight for tenure at the University, and the competition heats up when the girls get involved.
21. S06E21The Closure AlternativeApril 25, 2013 8.1Sheldon feels lost after one of his favorite TV shows gets canceled too soon and Amy tries to help him get over his compulsive need for clos
22. S06E22The Proton ResurgenceMay 2, 2013 7.6Sheldon and Leonard hire Professor Proton, the host of their favorite childhood TV show, to perform. Also, Howard and Bernadette run into tr
23. S06E23The Love Spell PotentialMay 9, 2013 7.9When the girls' trip to Vegas falls through, the guys invite them to play Dungeons & Dragons, causing Sheldon and Amy's relationship to
24. S06E24The Bon Voyage ReactionMay 16, 2013 7.4New success for Leonard makes Sheldon very jealous and throws Penny for a loop. Meanwhile, Koothrappali pushes Lucy too far in their relatio

Season 6 ranked & reviewed

1. S07E01The Hofstadter InsufficiencySeptember 26, 2013 7.6With Leonard away, Sheldon and Penny spend quality time together sharing intimate secrets. Also, Wolowitz helps Raj get over his ex-girlfrie
2. S07E02The Deception VerificationSeptember 26, 2013 7.8Leonard's friendship with Sheldon is put to the test when he returns from the North Sea. Meanwhile, Wolowitz's relationship with his mother
3. S07E03Season's bestThe Scavenger VortexOctober 3, 2013 8.1When the entire gang competes in a scavenger hunt designed by Raj, it brings out the best - and worst - in everyone.
4. S07E04The Raiders MinimizationOctober 10, 2013 7.6Sheldon seeks revenge after Amy ruins one of his favorite movies. Meanwhile, Leonard discovers a way to get Penny to do anything, and Raj an
5. S07E05The Workplace ProximityOctober 17, 2013 7.6Sheldon must decide how much "Amy time" is too much after she takes a job at his university. Meanwhile, Howard finds himself sleeping on Raj
6. S07E06The Romance ResonanceOctober 24, 2013 8.0Sheldon's major scientific breakthrough makes him feel like a fraud. Meanwhile, Howard's romantic gesture to Bernadette causes Penny to step
7. S07E07The Proton DisplacementNovember 7, 2013 7.4Sheldon feels slighted when Professor Proton seeks advice from Leonard instead of him, and he seeks revenge by befriending a rival science T
8. S07E08The Itchy Brain SimulationNovember 14, 2013 7.4Leonard tries to keep Sheldon from overreacting when a past mistake comes to light, but Sheldon punishes Leonard by making him walk a mile i
9. S07E09The Thanksgiving DecouplingNovember 21, 2013 8.0Sheldon protests when the gang drags him to Mrs. Wolowitz's house for Thanksgiving. Meanwhile, Penny and Leonard must deal with a mistake fr
10. S07E10The Discovery DissipationDecember 5, 2013 7.4Leonard and Amy help Sheldon cope with the shame he's feeling after his accidental contribution to science is disproved. Meanwhile, Raj must
11. S07E11The Cooper ExtractionDecember 12, 2013 7.6While Sheldon is away in Texas, everyone gathers to decorate the apartment Christmas tree, and they each realize how much he has changed the
12. S07E12The Hesitation RamificationJanuary 2, 2014 7.1When Penny's big acting break on NCIS is a bust, Leonard struggles to help her, which results in Penny asking Leonard a bold relationship qu
13. S07E13The Occupation RecalibrationJanuary 9, 2014 7.1Sheldon tries to relax after he is forced to take a vacation. Meanwhile, Leonard struggles to be supportive of Penny after she quits her job
14. S07E14The Convention ConundrumJanuary 30, 2014 7.3After the guys can't get Comic-Con tickets, Sheldon tries to hold his own convention and winds up spending a wild night with James Earl Jone
15. S07E15The Locomotive ManipulationFebruary 6, 2014 7.6Love is in the air when Sheldon and Amy join Howard and Bernadette for a trip to wine country. Meanwhile, Leonard and Penny must rush Raj's
16. S07E16The Table PolarizationFebruary 27, 2014 7.3Leonard buys a dining room table and it causes Sheldon to reevaluate the changes in his life. Meanwhile, Wolowitz is offered a chance to go
17. S07E17The Friendship TurbulenceMarch 6, 2014 7.0After the insults fly, Bernadette tries to broker the peace between Wolowitz and Sheldon. Meanwhile, Penny is offered an embarrassing movie
18. S07E18The Mommy ObservationMarch 13, 2014 7.1When Sheldon visits his Mom in Houston, he is forced to confront a new reality. Meanwhile, Raj's 'Murder Mystery' party starts some fights w
19. S07E19The Indecision AmalgamationApril 3, 2014 7.5While Raj is wracked with guilt when he tries to date two women at once, Penny wrestles with whether to take a role in a cheesy movie and Sh
20. S07E20The Relationship DiremptionApril 10, 2014 7.4Sheldon faces a personal crisis after deciding he's wasting his time with string theory. Meanwhile, a double date between Raj, Emily and the
21. S07E21The Anything Can Happen RecurrenceApril 24, 2014 7.3When Sheldon tries to be spontaneous, it leads to unexpected friction between Penny, Amy and Bernadette. Meanwhile, Raj seeks Howard's help
22. S07E22The Proton TransmogrificationMay 1, 2014 7.3Professor Proton helps Sheldon cope with grief, while Leonard turns a relationship milestone into a competition with Penny. Meanwhile, Amy a
23. S07E23The Gorilla DissolutionMay 8, 2014 7.5Bad day causes Penny to reevaluate her life choices - including Leonard. Meanwhile, Howard and Bernadette struggle to care for Mrs. Wolowitz
24. S07E24The Status Quo CombustionMay 15, 2014 7.3Sheldon is forced to confront an uncertain future and considers a major move. Meanwhile, Raj and Emily take it to the next level, and Mrs. W

Season 7 ranked & reviewed

1. S08E01The Locomotion InterruptionSeptember 22, 2014 6.8Leonard and Amy take an unexpected road trip to Arizona to pick up Sheldon. Meanwhile, Penny interviews for a job at Bernadette's company, a
2. S08E02The Junior Professor SolutionSeptember 22, 2014 7.2Sheldon is ordered to teach a class, and the gang is surprised when Howard signs up to take it; and tensions between Penny and Bernadette af
3. S08E03The First Pitch InsufficiencySeptember 29, 2014 6.8Wolowitz is nervous after NASA asks him to throw out the first pitch at a Los Angeles Angels game. Meanwhile, Leonard and Penny try to prove
4. S08E04The Hook-Up ReverberationOctober 6, 2014 6.8Raj's honesty about his past comes back to haunt him after his girlfriend, Emily, is cold to Penny. Also, the guys consider becoming part-ow
5. S08E05The Focus AttentuationOctober 13, 2014 7.1Amy and Bernadette accuse Penny of being a "buzzkill" after she gets an email from work during their Vegas weekend. Meanwhile, the guys try
6. S08E06The Expedition ApproximationOctober 20, 2014 7.1Sheldon and Raj test whether they could survive a dark-matter research expedition in a salt mine by simulating the conditions in a steam tun
7. S08E07The Misinterpretation AgitationOctober 30, 2014 7.3The guys try to help Penny out of an awkward work dilemma. Meanwhile, Amy and Bernadette argue over whether or not female scientists should
8. S08E08Season's bestThe Prom EquivalencyNovember 6, 2014 7.4When the gang recreates a high school prom on the roof the of the guys' apartment building, Sheldon feels pressure to participate in all the
9. S08E09The Septum DeviationNovember 13, 2014 7.1When Leonard gets minor surgery on his nose, Sheldon is the one in need of sympathy. Meanwhile, Raj's parents' impending divorce causes Howa
10. S08E10The Champagne ReflectionNovember 20, 2014 6.7Sheldon says a tearful goodbye to "Fun with Flags." Also, Leonard, Howard and Raj look for something significant in a dead professor's resea
11. S08E11The Clean Room InfiltrationDecember 11, 2014 6.8On Christmas Eve, Amy plans a traditional Victorian dinner, while Raj, Leonard and Howard scramble to remove a pigeon that flew into the cle
12. S08E12The Space Probe DisintegrationJanuary 8, 2015 7.0Wolowitz tries to distract Raj, who is anxiously awaiting data from a space probe he helped launch. Meanwhile, Sheldon and Leonard go dress
13. S08E13The Anxiety OptimizationJanuary 29, 2015 7.2The gang tries to help Sheldon when he becomes stuck in a rut at work by increasing his anxiety level. Howard teases Raj with a new game cal
14. S08E14The Troll ManifestationFebruary 5, 2015 7.1After Leonard and Sheldon co-publish a physics paper, they must defend themselves against criticism from an online bully. Also, girls' night
15. S08E15The Comic Book Store RegenerationFebruary 19, 2015 6.9Wolowitz receives some shocking news as everyone prepares for the reopening of Stuart's comic book store. Penny teaches Sheldon how to "let
16. S08E16The Intimacy AccelerationFebruary 26, 2015 7.0As a joke, Sheldon and Penny try an experiment designed to make participants fall in love. Also, Leonard, Amy, Raj and Emily spend the eveni
17. S08E17The Colonization ApplicationMarch 5, 2015 7.1Trouble arises when Amy learns Sheldon has applied for a one-way mission to colonize Mars. Also, a trip to the pet store ends in a fight for
18. S08E18The Leftover ThermalizationMarch 12, 2015 7.2Friction ensues when a magazine fails to mention Leonard in an article about the paper he co-wrote with Sheldon. Also, a blackout at Mrs. Wo
19. S08E19The Skywalker IncursionApril 2, 2015 7.2When Leonard and Sheldon are invited to speak at UC Berkeley, they take a detour to try to meet an idol. Also, when Bernadette and Howard ba
20. S08E20The Fortification ImplementationApril 9, 2015 6.9When Sheldon and Amy build a blanket fort, they come to major crossroads in their relationship. Also, Wolowitz meets the half-brother he nev
21. S08E21The Communication DeteriorationApril 16, 2015 6.8When Raj is asked to create a message in case a NASA mission discovers alien life, the guys fight over what he should do. Also, Penny is tor
22. S08E22The Graduation TransmissionApril 23, 2015 7.2Wolowitz questions his engineering abilities when he and Sheldon can't get a toy drone to fly. Meanwhile, a cancelled flight nearly prevents
23. S08E23The Maternal CombustionApril 30, 2015 7.1Personalities collide when Sheldon and Leonard's mothers finally meet. Meanwhile, Howard finally decides to "man up" and do his fair share o
24. S08E24The Commitment DeterminationMay 7, 2015 7.3In the Season 8 finale, Leonard and Penny are pressured to set a wedding date by Sheldon, whose relationship with Amy has taken an interesti

Season 8 ranked & reviewed

1. S09E01The Matrimonial MomentumSeptember 21, 2015 6.8After driving to Vegas to get married, Penny struggles with Leonard's confession that he kissed another girl. Also, Sheldon doesn't know how
2. S09E02The Separation OscillationSeptember 28, 2015 6.9Leonard confronts the woman he kissed on the North Sea in an attempt to set Penny's mind at ease. Also, Sheldon films a special episode of "
3. S09E03The Bachelor Party CorrosionOctober 5, 2015 7.2The guys surprise Leonard with a belated bachelor-party weekend in Mexico, but their plans hit a bump in the road when they get a flat tire
4. S09E04The 2003 ApproximationOctober 12, 2015 7.0Sheldon learns of an impending change in his living arrangements and decides to revert back to 2003, a simpler time before he met Leonard an
5. S09E05The Perspiration ImplementationOctober 19, 2015 6.9The guys take a fencing lesson from Barry Kripke and Sheldon finds himself in an awkward position when Kripke expresses interest in Amy. Als
6. S09E06The Helium InsufficiencyOctober 26, 2015 6.8In the midst of a nation-wide helium shortage, Sheldon and Leonard take desperate measures to get the supplies they need. Also, Penny and Be
7. S09E07The Spock ResonanceNovember 5, 2015 7.1While being interviewed for a documentary about Spock from "Star Trek", Sheldon struggles to suppress his emotions about his recent break-up
8. S09E08The Mystery Date ObservationNovember 12, 2015 7.3When Leonard, Penny and Bernadette learn that Amy is going out on a dinner date, the trio set out to spy on her and the guy. Meanwhile, Shel
9. S09E09The Platonic PermutationNovember 19, 2015 7.3Sheldon and Amy try hanging out as friends when they spend Thanksgiving together at the aquarium. Also, Wolowitz reluctantly agrees to volun
10. S09E10The Earworm ReverberationDecember 10, 2015 7.3Sheldon has a revelation when he realizes why a song was stuck in his head. Also, Amy invites Dave over for dinner despite their previously
11. S09E11Season's bestThe Opening Night ExcitationDecember 17, 2015 7.6As the guys prepare to go to the premiere of the new Star Wars movie, Sheldon plans a special event for Amy's birthday. Also, Leonard, Wolow
12. S09E12The Sales Call SublimationJanuary 7, 2016 6.9Penny gets more than she bargained for when Leonard agrees to meet with a psychiatrist on her behalf. Also, Sheldon and Koothrappali collabo
13. S09E13The Empathy OptimizationJanuary 14, 2016 7.2After having to deal with a sick Sheldon, Leonard, Penny and the gang try to treat themselves to a Sheldon-free weekend.
14. S09E14The Meemaw MaterializationFebruary 4, 2016 7.3Sheldon's thrilled when his Meemaw comes to visit, but his excitement quickly fades when she butts heads with Amy. Also, Raj meets a new gir
15. S09E15The Valentino SubmergenceFebruary 11, 2016 7.2Sheldon and Amy host a live Valentine's Day episode of Fun with Flags, Leonard and Penny grapple with getting older, Howard and Bernadette f
16. S09E16The Positive Negative ReactionFebruary 18, 2016 7.2When the gang finds out about Bernadette's pregnancy, they celebrate by singing karaoke. Also, Bernadette is concerned when Wolowitz freaks
17. S09E17The Celebration ExperimentationFebruary 25, 2016 7.1After more than nine years together, the gang finally celebrates Sheldon's birthday, surprising him with a special guest.
18. S09E18The Application DeteriorationMarch 10, 2016 7.4Leonard, Sheldon, and Wolowitz run into problems when they file for a patent for their infinite persistence gyroscope. Also, Penny, Amy and
19. S09E19The Solder Excursion DiversionMarch 31, 2016 7.3Amy is shocked at a revelation from Sheldon after she buys him a new laptop. Also, Koothrappali sells out Leonard and Wolowitz after they li
20. S09E20The Big Bear PrecipitationApril 7, 2016 7.1Sheldon spills a secret of Leonard's when the two take a weekend cabin trip with Penny and Amy. Also, when Koothrappali goes overboard with
21. S09E21The Viewing Party CombustionApril 21, 2016 7.3Everyone must choose sides when a small argument between Leonard and Sheldon erupts into a heated fight during a group get-together.
22. S09E22The Fermentation BifurcationApril 28, 2016 7.5The gang goes to a wine bar and runs into Penny's old boyfriend, Zack. Also, Bernadette gets stuck spending the evening with Sheldon when sh
23. S09E23The Line Substitution SolutionMay 5, 2016 7.1Sheldon hires Stuart to spend the day with Amy when he'd rather go to a movie screening. Also, Leonard's mother, Beverly, comes to town and
24. S09E24The Convergence ConvergenceMay 12, 2016 7.5Chaos ensues when Leonard's recently divorced parents, Alfred and Beverly, and Sheldon's devoutly religious mother, Mary, come to town. Also

Season 9 ranked & reviewed

1. S10E01The Conjugal ConjectureSeptember 19, 2016 7.1After Sheldon's mother and Leonard's father share an evening together, everyone deals with an awkward morning the following day. Also, Penny
2. S10E02The Military MiniaturizationSeptember 26, 2016 7.2Colonel Williams, an Air Force representative from the Department of Material Command sits down to talk with Wolowitz.
3. S10E03The Dependence TranscendenceOctober 3, 2016 7.1Tensions rise when the boys struggle to complete their government project on time and Sheldon tries an energy drink to stay awake. Also, Pen
4. S10E04Season's bestThe Cohabitation ExperimentationOctober 10, 2016 7.7When Amy's apartment floods, she proposes a "cohabitation experiment" with Sheldon. Also, Howard and Bernadette are upset when Koothrappali
5. S10E05The Hot Tub ContaminationOctober 17, 2016 7.0Leonard and Penny must separate a quarreling Sheldon and Amy when their cohabitation does not go as planned, and Sheldon threatens to break
6. S10E06The Fetal Kick CatalystOctober 27, 2016 7.2Penny is surprised to learn she has fans of her performance in "Serial Ape-ist" when she attends Van Nuys Comic Con with Leonard. Also, Amy
7. S10E07The Veracity ElasticityNovember 3, 2016 7.2In order to continue living with Sheldon, Amy lies to him about repairs being made to her apartment and they host an "on location" episode o
8. S10E08The Brain Bowl IncubationNovember 10, 2016 7.3After a successful experiment combining their genes, Sheldon will stop at nothing to convince Amy they should procreate. Also, Koothrappali
9. S10E09The Geology ElevationNovember 17, 2016 7.3When Bert, a Caltech geologist, wins the MacArthur Genius fellowship, Sheldon is overcome with jealousy. Also, Wolowitz finds an old remote
10. S10E10The Property Division CollisionDecember 1, 2016 7.0Sheldon and Leonard must divide up their possessions and remove Penny's things from 4B.
11. S10E11The Birthday SynchronicityDecember 15, 2016 6.9Sheldon and Amy attempt to have an intimate moment together to celebrate Amy's birthday; Bernadette and Wolowitz welcome their newborn baby
12. S10E12The Holiday SummationJanuary 5, 2017 6.8Sheldon and Amy visit Leonard and Penny for the first time since the holidays and share details about their terrible trip to Texas.
13. S10E13The Romance RecalibrationJanuary 19, 2017 6.9Leonard 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 st
14. S10E14The Emotion Detection AutomationFebruary 2, 2017 6.7Sheldon beta tests an MIT invention after hearing it can help him read people's emotions. Also, Leonard can't hide his feelings when Penny a
15. S10E15The Locomotion ReverberationFebruary 9, 2017 7.1Leonard and Wolowitz try to distract Sheldon when he slows the progress of their guidance system. Also, Penny and Amy take Bernadette out fo
16. S10E16The Allowance EvaporationFebruary 16, 2017 6.9Sheldon and Amy have their first fight since moving in together, and Koothrappali is shocked at the realities of financial independence when
17. S10E17The Comic-Con ConundrumFebruary 23, 2017 7.1With Koothrappali cut off from his father's fortune, he appoints Sheldon to help him get out of debt. Also, Penny considers joining Leonard
18. S10E18The Escape Hatch IdentificationMarch 9, 2017 6.9When Raj moves out of his apartment, Leonard and Penny offer him Sheldon's old room.
19. S10E19The Collaboration FluctuationMarch 30, 2017 6.7Leonard, Penny and Raj adjust to their new living arrangement, and Sheldon takes an interest in Amy's work.
20. S10E20The Recollection DissipationApril 6, 2017 6.9Sheldon pushes himself to the limit when he collaborates on projects with Leonard and Wolowitz as well as Amy on the same day. Also, Bernade
21. S10E21The Separation AgitationApril 13, 2017 6.6Howard and Bernadette have a hard time leaving Halley in day care when Bernadette returns to work. Also, Bert introduces the gang to his new
22. S10E22The Cognition RegenerationApril 27, 2017 6.8Leonard isn't thrilled when Penny considers taking a new job offered by her ex-boyfriend, Zack.
23. S10E23The Gyroscopic CollapseMay 4, 2017 7.0After Leonard, Sheldon and Wolowitz celebrate the completion of the top secret air force project, they are met with an unpleasant surprise.
24. S10E24The Long Distance DissonanceMay 11, 2017 7.4The gang is concerned when Sheldon's former admirer, Dr. Ramona Nowitzki, resurfaces while Amy is away at Princeton.

Season 10 ranked & reviewed

1. S11E01The Proposal ProposalSeptember 25, 2017 7.0Amy gives Sheldon an answer to his proposal while Howard and Bernadette struggle with some unexpected news.
2. S11E02The Retraction ReactionOctober 2, 2017 6.8Leonard angers the university – and the entire physics community – after he gives an embarrassing interview. Also, Amy and Bernadette bond o
3. S11E03The Relaxation IntegrationOctober 9, 2017 6.9As Sheldon stresses about picking a wedding date, Amy tries to convince him he has a more laid-back side. Also, Koothrappali and Stuart comp
4. S11E04The Explosion ImplosionOctober 16, 2017 6.6Howard and Sheldon bond when they drive to the desert to shoot off a model rocket. Also, when Leonard's mom, Beverly, finds a new best frien
5. S11E05The Collaboration ContaminationOctober 23, 2017 6.7Sheldon and Koothrappali confide in Bernadette when they can't handle Amy and Wolowitz working together. Also, Penny and Leonard learn new t
6. S11E06The Proton RegenerationNovember 2, 2017 6.9Sheldon goes head-to-head with Wil Wheaton for the role of the new Professor Proton. Also, Penny steps in to take care of Halley when Bernad
7. S11E07The Geology MethodologyNovember 9, 2017 6.7Sheldon and Bert collaborate on a research project, despite Sheldon's embarrassment. Also, Penny and Bernadette coach Koothrappali on how to
8. S11E08The Tesla RecoilNovember 16, 2017 6.7Leonard and Wolowitz are furious after they learn Sheldon went to work with the military behind their backs. Also, while Bernadette is on be
9. S11E09The Bitcoin EntanglementNovember 30, 2017 6.8Sheldon tries to teach the guys a lesson after they cut him out of a potentially valuable Bitcoin investment. Also, a seven-year-old video r
10. S11E10The Confidence ErosionDecember 7, 2017 7.0Sheldon and Amy try to eliminate stress from wedding planning by applying math to the process. Also, Koothrappali "breaks up" with Wolowitz
11. S11E11The Celebration ReverberationDecember 14, 2017 6.3Sheldon and Wolowitz plan birthday celebrations for Amy and Halley, respectively. Also, Leonard receives a Christmas letter from his brother
12. S11E12The Matrimonial MetricJanuary 4, 2018 6.9To discover who would be most qualified to be best man and maid of honor at their wedding, Sheldon and Amy subject their friends to a series
13. S11E13The Solo OscillationJanuary 11, 2018 6.9When Sheldon kicks Amy out to work solo, she and Leonard bond during a series of science experiments. Also, Bert the geologist replaces Wolo
14. S11E14The Separation TriangulationJanuary 18, 2018 6.8Koothrappali finds himself in the middle of domestic drama when he learns the woman he's dating, Nell, has a very upset husband, Oliver. Als
15. S11E15The Novelization CorrelationFebruary 1, 2018 6.7When Sheldon petitions Wil Wheaton to appear on the new Professor Proton show, Wil offers a role to Amy instead. Also, Penny gets angry when
16. S11E16The Neonatal NomenclatureMarch 1, 2018 6.3When Bernadette won't go into labor, all her friends try different tactics to get things started. Also, Wolowitz confronts Bernadette after
17. S11E17The Athenaeum AllocationMarch 8, 2018 6.4Leonard jumps through hoops to help secure the perfect wedding venue for Sheldon and Amy. Also, Bernadette and Wolowitz have a hard time dec
18. S11E18The Gates ExcitationMarch 29, 2018 6.6Penny gets the opportunity to host Bill Gates at work when his company wants to partner with her pharmaceutical company. Also, Leonard, Koot
19. S11E19The Tenant DisassociationApril 5, 2018 6.4When Leonard learns Sheldon is the president of the tenants association, he decides to run against him. Also, Bernadette encourages Wolowitz
20. S11E20The Reclusive PotentialApril 12, 2018 6.8A brilliant but reclusive scientist, Doctor Wolcott, invites Sheldon to his cabin in the middle of nowhere, and Leonard, Raj and Howard go a
21. S11E21The Comet PolarizationApril 19, 2018 7.1Sheldon's comic book store experiences changes when writer Neil Gaiman puts Stuart's store on the map. Also, Koothrappali takes credit for P
22. S11E22The Monetary InsufficiencyApril 26, 2018 6.8Sheldon goes to Vegas to win money for science. Also, Penny and Bernadette take Amy wedding dress shopping, but her terrible choice entangle
23. S11E23Season's bestThe Sibling RealignmentMay 3, 2018 7.4When Sheldon learns that his mother won't attend his wedding unless he invites his brother, Georgie, he and Leonard travel to Texas to end a
24. S11E24The Bow Tie AsymmetryMay 10, 2018 7.4Amy and Sheldon's wedding provides Sheldon with the information he needs to make a breakthrough in his symmetrical string theory. Meanwhile,

Season 11 ranked & reviewed

1. S12E01The Conjugal ConfigurationSeptember 24, 2018 7.0Sheldon and Amy's honeymoon runs aground in New York, while Penny and Leonard discover they are uncomfortably similar to Amy's parents, Mr.
2. S12E02The Wedding Gift WormholeSeptember 27, 2018 6.9Sheldon and Amy drive themselves crazy trying to figure out what "perfect gift" Leonard and Penny gave them for their wedding. Also, Koothra
3. S12E03The Procreation CalculationOctober 4, 2018 6.4The Wolowitzes' life gets complicated when Stuart starts bringing his new girlfriend home. Also, Penny and Leonard talk about starting a fam
4. S12E04The Tam TurbulenceOctober 11, 2018 6.8When Sheldon won't tell anyone why he's never mentioned Tam, his childhood best friend, Leonard takes matters into his own hands. Also, Bern
5. S12E05The Planetarium CollisionOctober 18, 2018 6.5When Amy doesn't have time to work on super-asymmetry, Sheldon goes to great lengths to ensure she's available to work with him even it if m
6. S12E06The Imitation PerturbationOctober 25, 2018 7.4When Wolowitz dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny's Halloween party. Also, Leonard is shocke
7. S12E07The Grant Allocation DerivationNovember 1, 2018 7.0Leonard is caught between a rock and a hard place when he's responsible for distributing extra grant money. Also, Bernadette turns the backy
8. S12E08The Consummation DeviationNovember 8, 2018 7.2Sheldon 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 M
9. S12E09The Citation NegationNovember 15, 2018 6.8Sheldon and Amy are devastated after learning from a Russian paper that Super Asymmetry has already been discovered and disproven. Also, ult
10. S12E10The VCR IlluminationDecember 6, 2018 7.2Sheldon and Amy are still down about their theory being disproven, but a VHS tape from Sheldon's past inspires him not to give up. Also, Ber
11. S12E11The Paintball ScatteringJanuary 3, 2019 6.8Penny and Leonard organize a paintball game that results in mayhem when Sheldon is jealous of Amy. Also, Koothrappali catches Anu with her e
12. S12E12The Propagation PropositionJanuary 10, 2019 7.0Penny's ex-boyfriend, Zack, and his wife want a baby, but when Zack is infertile, they ask Leonard for help. Also, Koothrappali attempts to
13. S12E13The Confirmation PolarizationJanuary 17, 2019 6.8When Sheldon and Amy's super asymmetry theory is proven by two physicists, Dr. Pemberton and Dr. Campbell from Chicago, they're thrilled, un
14. S12E14The Meteorite ManifestationJanuary 31, 2019 6.9Sheldon is thrilled to help Bernadette and Wolowitz navigate bureaucratic paperwork, until he discovers they are breaking the law. Also, Leo
15. S12E15The Donation OscillationFebruary 7, 2019 7.0Penny tries to seduce an abstaining Leonard to ruin his "donation" for her ex-boyfriend, Zack, and his wife, Marissa. Also, Wolowitz, Bernad
16. S12E16The D&D VortexFebruary 21, 2019 7.5When the gang finds out Wil Wheaton hosts a celebrity Dungeons and Dragons game involving William Shatner, Joe Manganiello, Kareem Abdul-Jab
17. S12E17The Conference ValuationMarch 7, 2019 6.7When Penny and Bernadette go to San Diego for a pharmaceutical sales convention, Wolowitz is in charge of the kids. Also, Sheldon finds a bo
18. S12E18The Laureate AccumulationApril 4, 2019 7.0When competitors Pemberton and Campbell charm America on a publicity tour, Sheldon and Amy try to bring Nobel laureates Kip Thorne, George S
19. S12E19The Inspiration DeprivationApril 18, 2019 6.8The concept of what it would mean for women everywhere if Amy were to win a Nobel Prize causes Amy to have a meltdown. Also, Koothrappali an
20. S12E20The Decision ReverberationApril 25, 2019 7.1Koothrappali is worried people won't take him seriously in his own field after publishing a paper that suggests he may have discovered alien
21. S12E21The Plagiarism SchismMay 2, 2019 7.2Kripke has proof that Dr. Pemberton plagiarized his thesis in college, and Sheldon and Amy aren't sure if they should turn him in or not. Al
22. S12E22The Maternal ConclusionMay 9, 2019 7.3Leonard 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.
23. S12E23The Change ConstantMay 16, 2019 7.7Sheldon and Amy await big news.
24. S12E24Season's bestThe Stockholm SyndromeMay 16, 2019 8.3Bernadette and Wolowitz leave their kids for the first time; Penny and Leonard try to keep a secret; Sheldon and Amy stick together; and Koo

Season 12 ranked & reviewed