The Big Bang Theory

The Big Bang Theory78%

TV 2007-09-24 22m Comedy Primetime Emmy Awards 5 Golden Globe Awards 1 TCA Award for Outstanding Achievement in Comedy 2 TCA Award for Individual Achievement in Comedy 1 Satellite Award for Best Actor – Television Series Musical or Comedy 1 Satellite Award for Best Television Series – Musical or Comedy 1
★ 7.9 / 10 · 12,757 votes
Ratings
Combined
78.0 %
7 sources
IMDb
8.1 /10
944,819 votes
Rotten Tomatoes
81 %
123 votes
Metacritic
61 %
50 votes
Trakt
78 %
35,851 votes
TMDB
79 %
12,731 votes
Metacritic Users
7.4 /10
3,368 votes
RT Audience
85 %

Physicists Leonard and Sheldon find their nerd-centric social circle with pals Howard and Raj expanding when aspiring actress Penny moves in next door.

6.0 /10 DuckTrack score 2 ratings
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View watch stats for The Big Bang Theory →
Status
Ended
Runtime
22m
Seasons
12
Episodes
279
Studios
Chuck Lorre Productions , Warner Bros. Television
Network
CBS
Country
United States of America
Language
English
Links
IMDb, TVDB, Wikidata

Awards

Won 5 Primetime Emmy Awards

Primetime Emmy Awards 5 won · 16 nominated

  • 2014 Outstanding Lead Actor in a Comedy Series Won Jim Parsons
  • 2014 Outstanding Guest Actor in a Comedy Series Nominated
  • 2014 Outstanding Comedy Series Nominated
  • 2014 Outstanding Supporting Actress in a Comedy Series Nominated
  • 2013 Outstanding Guest Actor in a Comedy Series Won Bob Newhart
  • 2013 Outstanding Lead Actor in a Comedy Series Won Jim Parsons
  • 2013 Outstanding Supporting Actress in a Comedy Series Nominated
  • 2013 Outstanding Art Direction for a Multi-Camera Series Nominated
  • 2013 Outstanding Comedy Series Nominated
  • 2012 Outstanding Comedy Series Nominated
  • 2012 Outstanding Supporting Actress in a Comedy Series Nominated
  • 2012 Outstanding Lead Actor in a Comedy Series Nominated
  • 2011 Outstanding Lead Actor in a Comedy Series Won Jim Parsons
  • 2011 Outstanding Art Direction for a Multi-Camera Series Nominated
  • 2011 Outstanding Comedy Series Nominated
  • 2010 Outstanding Lead Actor in a Comedy Series Won Jim Parsons
  • 2010 Outstanding Guest Actress in a Comedy Series Nominated
  • 2010 Outstanding Art Direction for a Multi-Camera Series Nominated
  • 2009 Outstanding Guest Actress in a Comedy Series Nominated
  • 2009 Outstanding Art Direction for a Multi-Camera Series Nominated
  • 2009 Outstanding Lead Actor in a Comedy Series Nominated

Golden Globe Awards 1 won · 3 nominated

  • 2013 Best Television Series – Musical or Comedy Nominated
  • 2012 Best Television Series – Musical or Comedy Nominated
  • 2011 Best Actor – Motion Picture Musical or Comedy Won Jim Parsons
  • 2010 Best Television Series – Musical or Comedy Nominated

Screen Actors Guild Awards 6 nominated

  • 2014 Outstanding Performance by an Ensemble in a Comedy Series Nominated
  • 2014 Outstanding Performance by a Male Actor in a Comedy Series Nominated
  • 2014 Outstanding Performance by a Female Actor in a Comedy Series Nominated
  • 2013 Outstanding Performance by a Male Actor in a Comedy Series Nominated
  • 2013 Outstanding Performance by an Ensemble in a Comedy Series Nominated
  • 2012 Outstanding Performance by an Ensemble in a Comedy Series Nominated

Directors Guild of America 2 nominated

  • 2013 Outstanding Directing – Comedy Series Nominated
  • 2012 Outstanding Directing – Comedy Series Nominated

TCA Award for Outstanding Achievement in Comedy 2 won · 3 nominated

  • 2014 Outstanding Achievement in Comedy Nominated
  • 2013 Outstanding Achievement in Comedy Won
  • 2012 Outstanding Achievement in Comedy Nominated
  • 2010 Outstanding Achievement in Comedy Nominated
  • 2009 Outstanding Achievement in Comedy Won

TCA Award for Individual Achievement in Comedy 1 won · 3 nominated

  • 2014 Individual Achievement in Comedy Nominated
  • 2012 Individual Achievement in Comedy Nominated
  • 2010 Individual Achievement in Comedy Nominated
  • 2009 Individual Achievement in Comedy Won Jim Parsons

Satellite Award for Best Actor – Television Series Musical or Comedy 1 won · 3 nominated

  • 2013 Best Actor – Television Series Musical or Comedy Nominated
  • 2012 Best Actor – Television Series Musical or Comedy Won Kaley Cuoco, Johnny Galecki
  • 2010 Best Actor – Television Series Musical or Comedy Nominated
  • 2009 Best Actor – Television Series Musical or Comedy Nominated

Satellite Award for Best Television Series – Musical or Comedy 1 won · 2 nominated

  • 2013 Best Television Series – Musical or Comedy Nominated
  • 2012 Best Television Series – Musical or Comedy Won CBS
  • 2009 Best Television Series – Musical or Comedy Nominated

Award data from Wikidata (CC0). Coverage may be incomplete.

Created by
Chuck Lorre Bill Prady
Cast
Johnny Galecki Johnny Galecki Leonard Hofstadter Jim Parsons Jim Parsons Sheldon Cooper Kaley Cuoco Kaley Cuoco Penny Simon Helberg Simon Helberg Howard Wolowitz Kunal Nayyar Kunal Nayyar Rajesh Koothrappali Melissa Rauch Melissa Rauch Bernadette Rostenkowski Mayim Bialik Mayim Bialik Amy Farrah Fowler Kevin Sussman Kevin Sussman Stuart Bloom Carol Ann Susi Carol Ann Susi Debbie Wolowitz (voice) John Ross Bowie John Ross Bowie Barry Kripke Laura Spencer Laura Spencer Emily Sweeney Wil Wheaton Wil Wheaton Wil Wheaton
Season 1 2007 · 17 eps
  1. 1 Pilot Brilliant physicist roommates Leonard and Sheldon meet their new neighbor Penny, who begins showing them that as much as they know about science, they know little about actual liv… Sep 24, 2007 23m
  2. 2 The Big Bran Hypothesis Leonard volunteers to sign for a package in an attempt to make a good impression on Penny, but when he enlists Sheldon for help, his attempt at chivalry goes terribly awry. Oct 1, 2007 21m
  3. 3 The Fuzzy Boots Corollary Leonard asks a woman out after he finds out that Penny is seeing someone. Oct 8, 2007 22m
  4. 4 The Luminous Fish Effect Sheldon's getting fired forces him to explore what life has to offer outside physics, leaving Leonard to take drastic action to snap his friend out of his funk. Oct 15, 2007 21m
  5. 5 The Hamburger Postulate Fearing he's wasting his time on Penny, Leonard ends up making a connection with Leslie. Oct 22, 2007 20m
  6. 6 The Middle-Earth Paradigm Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills. Oct 29, 2007 21m
  7. 7 The Dumpling Paradox With Wolowitz AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team Nov 5, 2007 21m
  8. 8 The Grasshopper Experiment Raj's parents set him up on a blind date, but just when he discovers he can talk to her, she shows interest in Sheldon. Nov 12, 2007 20m
  9. 9 The Cooper-Hofstadter Polarization When they're invited to present at a physics conference, Sheldon's reluctance to share the credit leads to a tiff between him and Leonard, and Penny's intervention only exacerbate… Mar 17, 2008 19m
  10. 10 The Loobenfeld Decay Leonard and Sheldon each lie to avoid seeing Penny's concert, but Sheldon's is a bit too complicated for his own good. Mar 24, 2008 21m
  11. 11 The Pancake Batter Anomaly With his friends knowing how sour he acts when sick—and avoiding him as a result—Sheldon is nursed by Penny, who hasn't a clue what she's in for. Mar 31, 2008 22m
  12. 12 The Jerusalem Duality With Sheldon rattled over meeting Dennis, a 15-year-old physicist who's smarter than he, Leonard helps him look for a way to debunk Dennis's research. Apr 14, 2008 20m
  13. 13 The Bat Jar Conjecture Sheldon finds himself booted from the gang's Physics Bowl team and replaced with Leslie, so he forms his own team, hoping to prove he's superior. Apr 21, 2008 22m
  14. 14 The Nerdvana Annihilation When delivery of another collectible leads to Penny's lashing out at Leonard, he decides it's time to give up his habit, much to his friends' protestation. Apr 28, 2008 20m
  15. 15 The Pork Chop Indeterminacy The rest of the gang fall for Sheldon's twin sister, and Leonard's plan to win her heart is derailed when Sheldon declares he'll be the one to decide who can date her. May 5, 2008 22m
  16. 16 The Peanut Reaction Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track. May 12, 2008 20m
  17. 17 The Tangerine Factor Penny's break-up spurs Leonard to summon the courage to ask her out, and each goes to Sheldon for advice on their upcoming date. May 19, 2008 20m
Season 2 2008 · 23 eps
  1. 1 The Bad Fish Paradigm Penny's first date with Leonard goes awry; Penny finds Sheldon to be an unwilling confidant. Sep 22, 2008 22m
  2. 2 The Codpiece Topology A jealous Leonard reacts to Penny's new guy by rebounding with Leslie. Sep 29, 2008 21m
  3. 3 The Barbarian Sublimation Sheldon creates a monster when he introduces Penny to online gaming. Oct 6, 2008 21m
  4. 4 The Griffin Equivalency Raj gets an inflated ego and makes a play for Penny after being referenced in a magazine article. Oct 13, 2008 21m
  5. 5 The Euclid Alternative Leonard and his friends stage an intervention to force Sheldon to face his fear of driving. Oct 20, 2008 20m
  6. 6 The Cooper-Nowitzki Theorem Sheldon and the gang are confused when a young grad student is attracted to him. Nov 3, 2008 21m
  7. 7 The Panty Piñata Polarization When Sheldon bans Penny from the apartment for numerous minor infractions, she decides to retaliate. Nov 10, 2008 21m
  8. 8 The Lizard-Spock Expansion Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life. Nov 17, 2008 20m
  9. 9 The White Asparagus Triangulation Sheldon is thrilled when Leonard starts dating a woman who meets Sheldon's stringent standards. Nov 24, 2008 21m
  10. 10 The Vartabedian Conundrum Leonard asks Penny for advice when his new relationship starts moving too fast. Dec 8, 2008 21m
  11. 11 The Bath Item Gift Hypothesis Penny starts dating Leonard's handsome colleague; Leonard and his friends are tortured by Sheldon's obsession with gift-giving etiquette. Dec 15, 2008 21m
  12. 12 The Killer Robot Instability Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the rest of guys are depending on him for. Jan 12, 2009 21m
  13. 13 The Friendship Algorithm Sheldon creates a scientific procedure for making friends. Jan 19, 2009 21m
  14. 14 The Financial Permeability Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend. Feb 2, 2009 21m
  15. 15 The Maternal Capacitance Leonard and Penny are drawn together after a disastrous visit from Leonard's mother. Feb 9, 2009 21m
  16. 16 The Cushion Saturation A paintball game leads to a fight between Sheldon and Penny, and romance for Leslie and Wolowitz. Mar 2, 2009 21m
  17. 17 The Terminator Decoupling Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress (Summer Glau) is on board the train they are taking to San Francisco. Mar 9, 2009 21m
  18. 18 The Work Song Nanocluster Penny's home business turns into a complete nightmare when Sheldon takes over. Mar 16, 2009 20m
  19. 19 The Dead Hooker Juxtaposition Penny squares off with a new beautiful female neighbor who may become the building's "new Penny." Mar 30, 2009 20m
  20. 20 The Hofstadter Isotope A fellow comic book enthusiast's hitting on Penny leads to Leonard and Howard going to a bar's Ladies' Night. Apr 13, 2009 20m
  21. 21 The Vegas Renormalization Leonard and Koothrappali escort a heartbroken Wolowitz to Las Vegas, and Sheldon becomes locked out of his apartment and must stay with Penny. Apr 27, 2009 22m
  22. 22 The Classified Materials Turbulence Penny's second date with Stuart sees her making a comment that gives Leonard new hope for a relationship with her. Wolowitz realizes there's a crucial error in a NASA project he's… May 4, 2009 19m
  23. 23 The Monopolar Expedition The guys' plan to work over the summer at the North Pole makes Penny revaluate her feelings for Leonard. May 11, 2009 21m
Season 3 2009 · 23 eps
  1. 1 The Electric Can Opener Fluctuation When Sheldon learns the guys tampered with his expedition data he got from the arctic, he leaves to Texas in disgrace. This results in the guys following him, which threatens Leon… Sep 21, 2009 22m
  2. 2 The Jiminy Conjecture Leonard and Penny struggle to recover from an awkward first hookup while Sheldon and Howard stake their best comic books on a bet to determine the species of a cricket. Sep 28, 2009 21m
  3. 3 The Gothowitz Deviation Howard and Raj visit a Goth nightclub to pick up women while Sheldon attempts to build a better Penny using chocolate-based behavior modification. Oct 5, 2009 20m
  4. 4 The Pirate Solution Raj 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 a third wheel. Oct 12, 2009 21m
  5. 5 The Creepy Candy Coating Corollary After overhearing that Wil Wheaton is entering a trading-card competition, Sheldon decides to enter it himself. Meanwhile, Penny sets up one of her friends on a date with Wolowitz. Oct 19, 2009 21m
  6. 6 The Cornhusker Vortex Sheldon becomes Leonard's teacher in order to understand football, while an incident with flying a kite threatens Howard and Raj's friendship. Nov 2, 2009 20m
  7. 7 The Guitarist Amplification A squabble between Leonard and Penny sees Sheldon playing mediator, though out of his own incovenience from the sitiation rather than altruism. Nov 9, 2009 19m
  8. 8 The Adhesive Duck Deficiency With Leonard, Howard and Raj away camping in the desert, an injured Penny has only Sheldon to rely on. Nov 16, 2009 21m
  9. 9 The Vengeance Formulation After he's humiliated on National Public Radio, Sheldon vows to destroy Kripke, while Wolowitz tries not to destroy his new relationship with Bernadette. Nov 23, 2009 19m
  10. 10 The Gorilla Experiment Penny gets help from Sheldon in order to understand what Leonard's work is, while Wolowitz develops a jealousy when Leonard starts hanging out with his new girlfriend. Dec 7, 2009 21m
  11. 11 The Maternal Congruence A Christmas visit from his mother has Leonard discovering she's kept a lot of news from him that she shares with Sheldon and worrying if she'll approve of his romance with Penny. Dec 14, 2009 20m
  12. 12 The Psychic Vortex Leonard is aghast to find out a secret of Penny's: she believes in psychics. Meanwhile, Sheldon tries to assist Koothrappali in picking up a girl at a university mixer. Jan 11, 2010 19m
  13. 13 The Bozeman Reaction When their apartment is robbed, Leonard and Sheldon turn to their friends to create a state-of-the-art security system. Jan 18, 2010 20m
  14. 14 The Einstein Approximation Sheldon's search for the answer to a physics problem leads him to work at the Cheesecake Factory with Penny. Feb 1, 2010 19m
  15. 15 The Large Hadron Collision Leonard can only bring one guest on a trip to see CERN's Large Hadron Collider (the world's largest and highest energy particle accelerator) in Switzerland on Valentine's Day. Feb 8, 2010 21m
  16. 16 The Excelsior Acquisition Sheldon winds up in traffic court when he gets a ticket because of Penny. Mar 1, 2010 21m
  17. 17 The Precious Fragmentation When the guys find a ring from "The Lord of the Rings" at a garage sale, it threatens to tear them apart. Mar 8, 2010 20m
  18. 18 The Pants Alternative Sheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award. Mar 22, 2010 21m
  19. 19 The Wheaton Recurrence A fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling. Apr 12, 2010 21m
  20. 20 The Spaghetti Catalyst When Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy. May 3, 2010 20m
  21. 21 The Plimpton Stimulation Leonard and Sheldon compete for the attention of a famous female physicist. May 10, 2010 21m
  22. 22 The Staircase Implementation Leonard tells Penny about how he met Sheldon for the first time...and what happened to the elevator. May 17, 2010 20m
  23. 23 The Lunar Excitation While Penny worries that dating Leonard has ruined her for normal guys, Wolowitz and Koothrappali search for Sheldon's perfect match online. May 24, 2010 20m
Season 4 2010 · 24 eps
  1. 1 The Robotic Manipulation Penny tags along on Sheldon's first ever date; Wolowitz finds a new use for a robotic arm. Sep 23, 2010 21m
  2. 2 The Cruciferous Vegetable Amplification Realizing he will not live long enough to download his consciousness into a robot body, Sheldon tries to extend his life span. Sep 30, 2010 21m
  3. 3 The Zazzy Substitution The guys are concerned as Sheldon searches for an alternative to human companionship. Oct 7, 2010 21m
  4. 4 The Hot Troll Deviation An embarrassing secret of Wolowitz's comes to light, while Sheldon and Raj have a small war at work. Oct 14, 2010 20m
  5. 5 The Desperation Emanation Leonard realizes he’s the only one without a girlfriend, while Sheldon wants to get rid of his. Oct 21, 2010 21m
  6. 6 The Irish Pub Formulation Leonard keeps an affair a secret from Sheldon, Howard and Raj. Oct 28, 2010 22m
  7. 7 The Apology Insufficiency Sheldon's answers during an FBI interview put Wolowitz's security clearance in jeopardy. Nov 4, 2010 21m
  8. 8 The 21-Second Excitation While the guys camp in line for a long-awaited movie screening, Penny and Bernadette invite Amy to her first slumber party. Nov 11, 2010 19m
  9. 9 The Boyfriend Complexity Penny asks Leonard to lie to her father, while Howard, Raj and Bernadette pull an all-nighter at a telescope. Nov 18, 2010 21m
  10. 10 The Alien Parasite Hypothesis Amy finds she has sexual feelings for Penny's ex, while Koothrappali and Wolowitz try to prove who would be the better superhero. Dec 9, 2010 20m
  11. 11 The Justice League Recombination The guys find a "super" use for Penny's new boyfriend, Zack, when they enter a costume contest as the Justice League. Dec 16, 2010 20m
  12. 12 The Bus Pants Utilization Leonard's idea for a smartphone app derails his friendship with Sheldon. Jan 6, 2011 21m
  13. 13 The Love Car Displacement Bernadette runs into her ex-boyfriend while attending a science event with Wolowitz. Jan 20, 2011 21m
  14. 14 The Thespian Catalyst Hoping it will make him a better teacher, Sheldon has Penny give him acting lessons. Raj has fantasies about a friend's girlfriend. Feb 3, 2011 21m
  15. 15 The Benefactor Factor A wealthy donor to the university makes Leonard consider how far he's willing to go for the sake of science. Feb 10, 2011 20m
  16. 16 The Cohabitation Formulation As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj's sister. Feb 17, 2011 20m
  17. 17 The Toast Derivation Sheldon becomes concerned when everybody begins to hang out at Raj's apartment and discovers Leonard is the center of the group. Feb 24, 2011 21m
  18. 18 The Prestidigitation Approximation Sheldon is baffled by Wolowitz's magic trick. Meanwhile, Leonard realizes dating Priya may make it impossible to continue being friends with Penny. Mar 10, 2011 21m
  19. 19 The Zarnecki Incursion Sheldon's online-game account is hacked by Todd Zarnecki, who then proceeds to steal all his items prompting the guys to go on a quest to retrieve them. Penny, Bernadette and Amy… Mar 31, 2011 21m
  20. 20 The Herb Garden Germination Sheldon and Amy decide to start several rumors about the others as a test. Meanwhile, Howard takes his relationship with Bernadette to even higher level. Apr 7, 2011 21m
  21. 21 The Agreement Dissection When Leonard spends too much time in the shower with Priya, Sheldon charges Leonard with two violations of the roommate agreement. However, before he can get too far, Priya uses h… Apr 28, 2011 21m
  22. 22 The Wildebeest Implementation Raj attempts to cure his social anxiety disorder while Penny uses Bernadette to spy on Leonard and his girlfriend. May 5, 2011 21m
  23. 23 The Engagement Reaction When Howard finally breaks the news to his mom that he's engaged to Bernadette, it lands her in the hospital. May 12, 2011 20m
  24. 24 The Roommate Transmogrification When Bernadette receives her PhD, Wolowitz feels emasculated. Raj and Leonard swap places and Penny does something she's regrets. May 19, 2011 21m
Season 5 2011 · 24 eps
  1. 1 The Skank Reflex Analysis Penny is worried with how damaged her friendship with the guys will be in the aftermath of her sleeping with Raj while Sheldon becomes the leader of the paintball team. Sep 22, 2011 21m
  2. 2 The Infestation Hypothesis A fight between Sheldon and Penny leaves Amy caught in the middle, while Leonard tries to spice up his long-distance relationship with Priya. Sep 22, 2011 20m
  3. 3 The Pulled Groin Extrapolation Leonard and Amy get to know each other better, while Howard and Bernadette spend the weekend with Mrs. Wolowitz. Sep 29, 2011 20m
  4. 4 The Wiggly Finger Catalyst Penny plays Matchmaker for Raj, which results in him finding a girl he is comfortable talking to. Oct 6, 2011 20m
  5. 5 The Russian Rocket Reaction Sheldon and Leonard get invited to a party at Wil Wheaton's house, and Howard gets an out-of-this-world opportunity. Oct 13, 2011 21m
  6. 6 The Rhinitis Revelation Sheldon's mother, Mary Cooper, comes to visit, but Sheldon is annoyed that she also spends time with the rest of the gang, instead of catering to his every demand. Oct 20, 2011 21m
  7. 7 The Good Guy Fluctuation A cute comic book artist puts Leonard and Priya’s relationship to the test, while Sheldon tries to scare the guys for Halloween. Oct 27, 2011 20m
  8. 8 The Isolation Permutation Amy becomes heartbroken when she discovers that Penny and Bernadette went wedding dress shopping without her. Nov 3, 2011 21m
  9. 9 The Ornithophobia Diffusion Leonard and Penny try hanging out as friends on a 'non-date', but end up purposely ruining each others chances with perspective dates. Meanwhile, Sheldon enlists the help of Berna… Nov 10, 2011 21m
  10. 10 The Flaming Spittoon Acquisition When Stuart asks Amy out on a date, Sheldon must confront his feelings and consider where his relationship with Amy is going. Nov 17, 2011 21m
  11. 11 The Speckerman Recurrence Leonard must face his fears after being contacted by his high school tormentor. Dec 8, 2011 20m
  12. 12 The Shiny Trinket Maneuver Sheldon gets in trouble with Amy when he isn't impressed by her recent accomplishment, and Howard must come to grips with Bernadette's dislike of children. Jan 12, 2012 21m
  13. 13 The Recombination Hypothesis Leonard, who broke up with Priya, asks Penny out to a spur-of the-moment romantic dinner for two, and the duo contemplates on their relationship. Jan 19, 2012 21m
  14. 14 The Beta Test Initiation Leonard and Penny deal with the idea of starting a relationship again and Raj finally finds a "woman" he can talk to without being drunk, in the form of Siri on his new phone. Mea… Jan 26, 2012 20m
  15. 15 The Friendship Contraction Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Wolowitz tries to pick his astronaut nickname. Feb 2, 2012 20m
  16. 16 The Vacation Solution When Sheldon is forced to take his vacation, he goes to work with Amy in her neurobiology lab. Feb 9, 2012 21m
  17. 17 The Rothman Disintegration Sheldon battles Kripke for a coveted office at the university. Penny receives a very unusual gift from Amy. Feb 16, 2012 21m
  18. 18 The Werewolf Transformation Sheldon becomes agitated when his regular barber is out sick. Astronaut training causes Howard to reconsider wanting to go into space. Penny beats Leonard in chess, the first time… Feb 23, 2012 21m
  19. 19 The Weekend Vortex Sheldon must choose between joining Amy at her aunt's birthday party or playing videogames all weekend with the guys. Mar 8, 2012 20m
  20. 20 The Transporter Malfunction Penny buys Leonard and Sheldon “Star Trek” collectibles as a thank-you, leading Sheldon to be haunted by Mr. Spock. Meanwhile, Raj decides he has met the “Future Mrs. Koothrappali… Mar 29, 2012 21m
  21. 21 The Hawking Excitation When Wolowitz gets to work with Stephen Hawking, Sheldon is willing to do anything to meet his hero. Apr 5, 2012 19m
  22. 22 The Stag Convergence After the guys throw Howard a bachelor party, Bernadette reconsiders marrying him after learning about his sexual history. Apr 26, 2012 21m
  23. 23 The Launch Acceleration When NASA moves up Howard's mission, he must face his fears and Bernadette's dad, thus putting the wedding plans in jeopardy. Meanwhile, Leonard says something surprising to Penny… May 3, 2012 21m
  24. 24 The Countdown Reflection The fifth season ends with Howard and Bernadette deciding to get married before his NASA mission, causing the gang to scurry into overdrive in an effort to stage the wedding. NASA… May 10, 2012 20m
Season 6 2012 · 24 eps
  1. 1 The Date Night Variable With his friends on dates, Raj must face his loneliness. Also, Wolowitz is caught in an argument between Bernadette and his mom, even while he’s in space. Sep 27, 2012 21m
  2. 2 The Decoupling Fluctuation When Sheldon learns that Penny is thinking about breaking up with Leonard, he tries to intervene. Meanwhile, in space, the other astronauts pick on Howard. Oct 4, 2012 21m
  3. 3 The Higgs Boson Observation Amy feels threatened when Sheldon hires a young female assistant, and the pressure of being in space takes its toll on Wolowitz. Oct 11, 2012 19m
  4. 4 The Re-Entry Minimization When Wolowitz returns from space, he doesn’t get the hero’s welcome he expected. Meanwhile, Game Night turns into a battle of the sexes. Oct 18, 2012 21m
  5. 5 The Holographic Excitation The gang celebrates Halloween at Stuart’s comic book store. Meanwhile, Leonard seduces Penny with science. Oct 25, 2012 21m
  6. 6 The Extract Obliteration Sheldon’s relationship with Stephen Hawking is threatened over a game of “Words with Friends,” and Penny secretly enrolls in a class at the local college. Nov 1, 2012 21m
  7. 7 The Habitation Configuration Wolowitz struggles with moving out of his mother’s house. Meanwhile, Sheldon is caught in the middle of an argument between Amy and Wil Wheaton. Nov 8, 2012 21m
  8. 8 The 43 Peculiarity Raj and Howard try to to figure out why Sheldon disappears at 2:45 every afternoon; jealousy arises in Penny and Leonard's relationship. Nov 15, 2012 21m
  9. 9 The Parking Spot Escalation When the University reassigns Sheldon’s parking spot to Wolowitz, their fight affects the whole gang. Nov 29, 2012 20m
  10. 10 The Fish Guts Displacement When Amy gets sick, Sheldon tries to nurse her back to health; Wolowitz and his father-in-law plan a fishing trip. Dec 6, 2012 21m
  11. 11 The Santa Simulation During a Dungeons and Dragons game, Sheldon revisits Christmas memories; Amy, Penny and Bernadette look for a date for Raj. Dec 13, 2012 21m
  12. 12 The Egg Salad Equivalency When Sheldon is accused of sexual harassment, he ends up getting Raj, Leonard and Howard in trouble. Jan 3, 2013 21m
  13. 13 The Bakersfield Expedition As the guys don costumes and go on a road trip to a comic book convention, the ladies decide to stay home and try to interpret a comic book. Jan 10, 2013 21m
  14. 14 The Cooper/Kripke Inversion Sheldon faces a crisis of confidence when he is forced to work with his nemesis, Barry Kripke; Raj and Howard buy expensive action figures of themselves. Jan 31, 2013 20m
  15. 15 The Spoiler Alert Segmentation A fight between Sheldon and Leonard impacts Amy and Penny's living arrangements; while Howard is away, Raj helps Mrs. Wolowitz out. Feb 7, 2013 21m
  16. 16 The Tangible Affection Proof The guys search for a perfect Valentine's Day gift for their significant others; Stuart and Raj host a "lonely people" party at the comic book store. Feb 14, 2013 21m
  17. 17 The Monster Isolation After a bad date, Koothrappali decides to never leave his apartment; Penny's acting skills impress Sheldon. Feb 21, 2013 19m
  18. 18 The Contractual Obligation Implementation Leonard, 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… Mar 7, 2013 20m
  19. 19 The Closet Reconfiguration Howard considers whether or not he should open a letter from his father; Penny and Leonard host a "grown-up" cocktail party. Mar 14, 2013 20m
  20. 20 The Tenure Turbulence The girls get involved when Leonard, Sheldon and Raj compete for tenure at the University. Apr 4, 2013 19m
  21. 21 The Closure Alternative Amy tries to help Sheldon get over his compulsive need for closure when one of his favorite TV shows is canceled; Raj discovers a secret about Lucy. Apr 25, 2013 20m
  22. 22 The Proton Resurgence Leonard and Sheldon hire the host (Bob Newhart) of their favorite childhood TV show to perform; Bernadette and Howard run into trouble while dog-sitting for Raj's pet. May 2, 2013 21m
  23. 23 The Love Spell Potential A 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 … May 9, 2013 21m
  24. 24 The Bon Voyage Reaction When Leonard receives an exciting opportunity to work overseas, Penny and Sheldon are thrown for a loop. Raj and Lucy's relationship comes to a crossroad. May 16, 2013 20m
Season 7 2013 · 24 eps
  1. 1 The Hofstadter Insufficiency With Leonard away, Sheldon and Penny spend quality time together sharing intimate secrets. Also, Wolowitz helps Raj get over his ex-girlfriend. Sep 26, 2013 21m
  2. 2 The Deception Verification Leonard and Sheldon's friendship is tested; Howard's latest foray into helping his mother has some disastrous side effects. Sep 26, 2013 21m
  3. 3 The Scavenger Vortex When the entire gang competes in a scavenger hunt designed by Raj, it brings out the best - and worst - in everyone. Oct 3, 2013 21m
  4. 4 The Raiders Minimization 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… Oct 10, 2013 21m
  5. 5 The Workplace Proximity Amy starts working at Caltech which causes friction with Sheldon. Howard agrees with Sheldon who mentions this to Bernadette causing a big fight for the Wolowitzes. Oct 17, 2013 19m
  6. 6 The Romance Resonance Sheldon's latest scientific breakthrough leaves him feeling like a fraud; a romantic gesture between Howard and Bernadette causes Penny to up her game with Leonard. Oct 24, 2013 21m
  7. 7 The Proton Displacement Sheldon 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. Nov 7, 2013 20m
  8. 8 The Itchy Brain Simulation When a mistake comes to light, Sheldon makes Leonard walk a mile in his shoes; Penny decides to confront Raj's ex-girlfriend, Lucy. Nov 14, 2013 20m
  9. 9 The Thanksgiving Decoupling Sheldon protests when the gang drags him to Mrs. Wolowitz’s house for Thanksgiving. Meanwhile, Penny and Leonard must deal with a mistake from her past. Nov 21, 2013 19m
  10. 10 The Discovery Dissipation Leonard has to deal with the fallout of disproving Sheldon's new scientific discovery. Raj spends a week at Howard and Bernadette's apartment. Dec 5, 2013 19m
  11. 11 The Cooper Extraction While Sheldon is at home in Texas, the rest of the gang realizes how much he has changed their lives as they decorate the apartment Christmas tree. Dec 12, 2013 21m
  12. 12 The Hesitation Ramification When Penny’s big acting break on NCIS is a bust, Leonard struggles to help her, which results in Penny asking Leonard a bold relationship question. Meanwhile, Raj and Stuart try t… Jan 2, 2014 21m
  13. 13 The Occupation Recalibration Sheldon tries to relax after he is forced to take a vacation. Meanwhile, Leonard struggles to be supportive of Penny after she quits her job, and Bernadette seeks Stuart’s help in… Jan 9, 2014 20m
  14. 14 The Convention Conundrum After 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 Jones. Meanwhile, the girls try to feel mor… Jan 30, 2014 21m
  15. 15 The Locomotive Manipulation Sheldon 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 chocola… Feb 6, 2014 20m
  16. 16 The Table Polarization Leonard buys a dining room table and it causes Sheldon to reevaluate the changes in his life. Meanwhile, Wolowitz is offered a chance to go back to space and Bernadette struggles … Feb 27, 2014 20m
  17. 17 The Friendship Turbulence After 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 di… Mar 6, 2014 19m
  18. 18 The Mommy Observation When Sheldon visits his Mom in Houston, he is forced to confront a new reality. Meanwhile, Raj’s ‘Murder Mystery’ party starts some fights within the gang. Mar 13, 2014 21m
  19. 19 The Indecision Amalgamation While 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 Sheldon is torn trying to choose between … Apr 3, 2014 19m
  20. 20 The Relationship Diremption Sheldon faces a personal crisis after deciding he’s wasting his time with string theory. Meanwhile, a double date between Raj, Emily and the Wolowitzes ends in embarrassment for H… Apr 10, 2014 21m
  21. 21 The Anything Can Happen Recurrence To prepare for a date with Emily, Howard acclimates Raj to horror movies. Penny and Sheldon are upset when they discover Amy and Bernadette lied to avoid hanging out with them. Apr 24, 2014 19m
  22. 22 The Proton Transmogrification As the gang celebrates Star Wars Day, Sheldon has difficulty dealing with the recent death of Arthur "Professor Proton" Jeffries. May 1, 2014 21m
  23. 23 The Gorilla Dissolution A bad day causes Penny to reevaluate her life choices – including Leonard. Meanwhile, Howard and Bernadette struggle to care for Mrs. Wolowitz, and Raj gets relationship advice fr… May 8, 2014 19m
  24. 24 The Status Quo Combustion Sheldon get upset about his career, the destruction of the comic book store and Leonard and Penny's future living arrangements. Howard and Bernadette can't keep hold of a caretake… May 15, 2014 21m
Season 8 2014 · 24 eps
  1. 1 The Locomotion Interruption Leonard and Amy make an unexpected trip to Arizona to fetch Sheldon; Penny interviews for a job at Bernadette's company; Stuart's relationship with Mrs. Wolowitz disturbs Howard. Sep 22, 2014 21m
  2. 2 The Junior Professor Solution Sheldon is forced to teach a class as a Junior Professor and Howard decides to enroll in it. Meanwhile, Amy plays both sides when tension arises between Penny and Bernadette. Sep 22, 2014 20m
  3. 3 The First Pitch Insufficiency Wolowitz feels nervous when he is asked to throw the first pitch at a Los Angeles Angels game. Penny and Leonard want to prove Sheldon wrong after he says he and Amy are the bette… Sep 29, 2014 19m
  4. 4 The Hook-Up Reverberation Raj's honesty comes back to haunt him when his new girlfriend is unfriendly to Penny. The guys think about becoming part owners in Stuart's store. Oct 6, 2014 19m
  5. 5 The Focus Attenuation The girls head to Las Vegas for some weekend fun, while the guys try to invent something cool, but only come up with new ways to procrastinate. Oct 13, 2014 19m
  6. 6 The Expedition Approximation Sheldon and Raj test whether they could survive a dark-matter research expedition in a salt mine by simulating the conditions in a steam tunnel deep underground. Meanwhile, Leonar… Oct 20, 2014 21m
  7. 7 The Misinterpretation Agitation The guys try to help Penny out of an awkward work dilemma, when a smitten doctor shows up at her door after her flirtatious sales techniques work a little too well. Meanwhile, Amy… Oct 30, 2014 20m
  8. 8 The Prom Equivalency The 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… Nov 6, 2014 20m
  9. 9 The Septum Deviation When Leonard gets minor surgery on his nose, Sheldon is the one in need of sympathy. Meanwhile, Raj's parents' impending divorce causes Howard and Bernadette to work on their own … Nov 13, 2014 20m
  10. 10 The Champagne Reflection While Sheldon says a tearful goodbye to the final installment of "Fun with Flags", Leonard, Howard and Raj search for something significant in a dead professor's research. And Ber… Nov 20, 2014 19m
  11. 11 The Clean Room Infiltration Leonard and Howard turn to Raj for help in dealing with a work emergency when they nearly come to blows after blaming each other for a potential disaster at the university. Amy th… Dec 11, 2014 19m
  12. 12 The Space Probe Disintegration Howard tries to distract Raj, who is anxiously awaiting data from a space probe he helped launch. Meanwhile, Sheldon and Leonard go dress shopping with Penny and Amy. Jan 8, 2015 20m
  13. 13 The Anxiety Optimization When Sheldon becomes stuck in a rut with his work, the gang tries to help him by raising his stress levels. Howard teases Raj with a game called "Emily or Cinnamon?" Jan 29, 2015 20m
  14. 14 The Troll Manifestation Leonard and Sheldon publish a paper which is widely accepted except for comments from an internet troll. Meanwhile, the girls reminisce about embarrassing incidents from their pas… Feb 5, 2015 21m
  15. 15 The Comic Book Store Regeneration Howard receives some shocking news as everyone prepares for the reopening of Stuart’s comic book store. Penny teaches Sheldon how to “let it go,” but can’t follow her own advice a… Feb 19, 2015 20m
  16. 16 The Intimacy Acceleration As a joke, Sheldon and Penny try an experiment designed to make participants fall in love. Meanwhile, Leonard, Amy, Raj and Emily spend the evening trying to escape a room with a … Feb 26, 2015 20m
  17. 17 The Colonization Application A 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" purchas… Mar 5, 2015 20m
  18. 18 The Leftover Thermalization Friction ensues when a magazine fails to mention Leonard in an article about the paper he co-wrote with Sheldon. Also, a blackout at Mrs. Wolowitz’s home leads to a final family d… Mar 12, 2015 19m
  19. 19 The Skywalker Incursion When 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 battle over the fate of his Doctor Who TA… Apr 2, 2015 21m
  20. 20 The Fortification Implementation When Sheldon and Amy build a blanket fort, they come to major crossroads in their relationship. Also, Howard meets the half-brother he never knew he had. Meanwhile, Penny is invit… Apr 9, 2015 20m
  21. 21 The Communication Deterioration When 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 torn between auditioning for a movie or ke… Apr 16, 2015 19m
  22. 22 The Graduation Transmission Howard questions his engineering abilities when he and Sheldon can’t get a toy drone to fly. Meanwhile, a cancelled flight nearly prevents Leonard from giving the commencement add… Apr 23, 2015 19m
  23. 23 The Maternal Combustion Personalities collide when Sheldon and Leonard’s mothers finally meet. Meanwhile, Howard finally decides to “man up” and do his fair share of the housework – but not without a lit… Apr 30, 2015 19m
  24. 24 The Commitment Determination As Sheldon presses Leonard and Penny to set a wedding date, he encounters major changes in his own relationship with Amy. Meanwhile, Raj contemplates breaking up with Emily, and H… May 7, 2015 20m
Season 9 2015 · 24 eps
  1. 1 The Matrimonial Momentum After driving to Vegas to get married, Penny struggles with Leonard’s confession that he kissed another girl. Also, Sheldon doesn't know how to act after Amy pushes pause on their… Sep 21, 2015 19m
  2. 2 The Separation Oscillation Leonard 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 "Fun with Flags" after his breakup with … Sep 28, 2015 19m
  3. 3 The Bachelor Party Corrosion The guys' science skills are put to the test when they get a flat tire during Leonard's bachelor party weekend in Mexico. Also, the girls force Penny to finally tell her family th… Oct 5, 2015 19m
  4. 4 The 2003 Approximation Sheldon learns of an impending change in his living arrangements and decides to revert back to 2003, a simpler time before he met Leonard and Penny. Also, Howard and Raj form a ba… Oct 12, 2015 19m
  5. 5 The Perspiration Implementation The guys take a fencing lesson from Barry Kripke and Sheldon finds himself in an awkward position when Kripke expresses interest in Amy. Also, when Stuart struggles to get female … Oct 19, 2015 19m
  6. 6 The Helium Insufficiency In the midst of a nation-wide helium shortage, Sheldon and Leonard take desperate measures to get the supplies they need. Also, Penny and Bernadette download a dating app on Amy's… Oct 26, 2015 19m
  7. 7 The Spock Resonance Wil Wheaton interviews Sheldon for a Star Trek documentary where he reveals the ring and his plan to propose to Amy. Bernadette wants to start renovating the house and the topic … Nov 5, 2015 19m
  8. 8 The Mystery Date Observation Sheldon, Wolowitz and Koothrappali post an online advertisement to find Sheldon a new girlfriend. Also, when Amy is coy with details about a guy she is dating, Penny and Bernadett… Nov 12, 2015 18m
  9. 9 The Platonic Permutation Sheldon and Amy try hanging out as friends when they spend Thanksgiving together at the aquarium. Also, Wolowitz reluctantly agrees to volunteer at the soup kitchen with Bernadett… Nov 19, 2015 21m
  10. 10 The Earworm Reverberation Sheldon has a revelation when he realizes why a song was stuck in his head. Also, Amy invites Dave over for dinner despite their previously awkward date, and Wolowitz and Koothrap… Dec 10, 2015 21m
  11. 11 The Opening Night Excitation After more than five years of dating, Sheldon and Amy spend their first night together. Also, Leonard, Wolowitz, and Koothrappali must decide who will take their extra Star Wars m… Dec 17, 2015 21m
  12. 12 The Sales Call Sublimation Penny gets more than she bargained for when Leonard agrees to meet with a psychiatrist on her behalf. Also, Sheldon and Koothrappali collaborate on an astronomical discovery, and … Jan 7, 2016 18m
  13. 13 The Empathy Optimization After having to deal with a sick Sheldon, Leonard, Penny and the gang try to treat themselves to a Sheldon-free weekend. Jan 14, 2016 19m
  14. 14 The Meemaw Materialization Meemaw meets Amy, but it isn't all roses. Meemaw seems to have an axe to grind with her. Sheldon comes to Amy's defense, but not before Meemaw lets a little secret of his slip. Feb 4, 2016 19m
  15. 15 The Valentino Submergence Sheldon and Amy host a live 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… Feb 11, 2016 20m
  16. 16 The Positive Negative Reaction When the gang finds out about Bernadette’s pregnancy, they celebrate by singing karaoke. Also, Bernadette is concerned when Wolowitz freaks out over her pregnancy announcement, … Feb 18, 2016 19m
  17. 17 The Celebration Experimentation After more than nine years together, the gang finally celebrates Sheldon’s birthday, surprising him with a special guest. Feb 25, 2016 19m
  18. 18 The Application Deterioration Leonard, Sheldon, and Wolowitz run into problems when they file for a patent for their infinite persistence gyroscope. Also, Penny, Amy and Bernadette give Koothrappali dating adv… Mar 10, 2016 18m
  19. 19 The Solder Excursion Diversion Amy is shocked at a revelation from Sheldon after she buys him a new laptop. Also, Koothrappali sells out Leonard and Wolowitz after they lie to their wives in order to attend an … Mar 31, 2016 21m
  20. 20 The Big Bear Precipitation Sheldon spills a secret of Leonard’s when the two take a weekend cabin trip with Penny and Amy. Also, when Koothrappali goes overboard with pregnancy gifts, Wolowitz and Bernade… Apr 7, 2016 19m
  21. 21 The Viewing Party Combustion Everyone must choose sides when a small argument between Leonard and Sheldon erupts into a heated fight during a group get-together. Apr 21, 2016 18m
  22. 22 The Fermentation Bifurcation The gang goes to a wine bar and runs into Penny’s old boyfriend, Zack. Also, Bernadette gets stuck spending the evening with Sheldon when she can’t go wine tasting with the group,… Apr 28, 2016 20m
  23. 23 The Line Substitution Solution Sheldon 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 Penny struggles to make a connection wi… May 5, 2016 18m
  24. 24 The Convergence Convergence Chaos ensues when Leonard’s recently divorced parents, Alfred and Beverly, and Sheldon’s devoutly religious mother, Mary, come to town. Also, Wolowitz and Koothrappali think the g… May 12, 2016 20m
Season 10 2016 · 24 eps
  1. 1 The Conjugal Conjecture After Sheldon’s mother and Leonard's father share an evening together, everyone deals with an awkward morning the next day. Also, Penny’s family arrives for the wedding ceremony, … Sep 19, 2016 22m
  2. 2 The Military Miniaturization Colonel Williams, an Air Force representative from the Department of Material Command sits down to talk with Wolowitz. Sep 26, 2016 19m
  3. 3 The Dependence Transcendence Tensions rise when the boys struggle to complete their government project on time and Sheldon tries an energy drink to stay awake. Also, Penny and Amy go to a “party” at Bert the … Oct 3, 2016 20m
  4. 4 The Cohabitation Experimentation When Amy’s apartment floods, she proposes a “cohabitation experiment” with Sheldon. Also, Howard and Bernadette are upset when Koothrappali learns the gender of the baby before th… Oct 10, 2016 20m
  5. 5 The Hot Tub Contamination Leonard and Penny must separate a quarreling Sheldon and Amy when their cohabitation does not go as planned, and Sheldon threatens to break off their relationship when Amy refuses… Oct 17, 2016 20m
  6. 6 The Fetal Kick Catalyst Penny 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 hosts a Sheldon-style brunch at Penny’s… Oct 27, 2016 18m
  7. 7 The Veracity Elasticity In order to continue living with Sheldon, Amy lies to him about repairs being made to her apartment and they host an "on location" episode of "Fun With Flags" in Penny’s apartment… Nov 3, 2016 21m
  8. 8 The Brain Bowl Incubation After a successful experiment combining their genes, Sheldon will stop at nothing to convince Amy they should procreate. Also, Koothrappali is embarrassed to tell the gang what th… Nov 10, 2016 19m
  9. 9 The Geology Elevation When Bert, a Caltech geologist, wins the MacArthur Genius fellowship, Sheldon is overcome with jealousy. Also, Wolowitz finds an old remote control Stephen Hawking action figure h… Nov 17, 2016 19m
  10. 10 The Property Division Collision Sheldon and Leonard try to divvy up their shared belongings, but can’t agree on anything. Also, Koothrappali and Stuart fight to be the most helpful during Bernadette’s final week… Dec 1, 2016 20m
  11. 11 The Birthday Synchronicity Howard and Bernadette welcome their new baby and Sheldon and Amy celebrate Amy’s birthday. Dec 15, 2016 20m
  12. 12 The Holiday Summation Sheldon and Amy visit Leonard and Penny for the first time since the holidays and share details about their terrible trip to Texas. Jan 5, 2017 21m
  13. 13 The Romance Recalibration When Penny feels that Leonard is taking her for granted, she decides to go on a spa weekend with Amy. Also, Wolowitz and Koothrappali try to fix a squeaky floorboard in the baby’s… Jan 19, 2017 19m
  14. 14 The Emotion Detection Automation Sheldon beta-tests an MIT invention after hearing it can help him read people’s emotions. Also, Leonard can’t hide his feelings when Penny announces her brother is coming to town,… Feb 2, 2017 19m
  15. 15 The Locomotion Reverberation Leonard and Wolowitz try to distract Sheldon when he slows the progress of their guidance system. Also, Penny and Amy take Bernadette out for the night, leaving Raj and Stuart to … Feb 9, 2017 20m
  16. 16 The Allowance Evaporation Sheldon and Amy have their first fight since moving in together, and Koothrappali is shocked at the realities of financial independence when he stops receiving support from his fa… Feb 16, 2017 18m
  17. 17 The Comic-Con Conundrum With Koothrappali cut off from his father’s fortune, he appoints Sheldon to help him get out of debt. Also, Penny considers joining Leonard at Comic-Con. Feb 23, 2017 19m
  18. 18 The Escape Hatch Identification When Raj moves out of his apartment, Leonard and Penny offer him Sheldon's old room. Mar 9, 2017 20m
  19. 19 The Collaboration Fluctuation Leonard, Penny and Raj adjust to their new living arrangement, and Sheldon takes an interest in Amy’s work. Mar 30, 2017 18m
  20. 20 The Recollection Dissipation Sheldon pushes himself to the limit when he collaborates on projects with Leonard and Wolowitz as well as Amy on the same day. Also, Bernadette is nearing the end of her maternity… Apr 6, 2017 19m
  21. 21 The Separation Agitation Howard and Bernadette have a hard time leaving Halley in day care when Bernadette returns to work. Also, Bert introduces the gang to his new girlfriend, Rebecca. Apr 13, 2017 20m
  22. 22 The Cognition Regeneration Leonard isn’t thrilled when Penny considers taking a new job offered by her ex-boyfriend, Zack. Apr 27, 2017 20m
  23. 23 The Gyroscopic Collapse After Leonard, Sheldon and Wolowitz celebrate the completion of the top secret air force project, they are met with an unpleasant surprise. Also, Amy is offered a summer position … May 4, 2017 19m
  24. 24 The Long Distance Dissonance The gang is concerned when Sheldon’s former admirer, Dr. Ramona Nowitzki, resurfaces while Amy is away at Princeton. May 11, 2017 19m
Season 11 2017 · 24 eps
  1. 1 The Proposal Proposal In the eleventh season opener, Amy gives Sheldon an answer to his proposal while Howard and Bernadette struggle with some unexpected news. Sep 25, 2017 21m
  2. 2 The Retraction Reaction Leonard angers the university – and the entire physics community – after he gives an embarrassing interview. Also, Amy and Bernadette bond over having to hide their success from S… Oct 2, 2017 21m
  3. 3 The Relaxation Integration Sheldon and Amy struggle with picking a wedding date, which stresses out Sheldon and causes him talking in his sleep. Meanwhile, Raj and Stuart fight over the attention of one of … Oct 9, 2017 20m
  4. 4 The Explosion Implosion As Howard worries about fatherhood, he and Sheldon bond when they jointly assemble a model rocket. Meanwhile, Penny bonds with Leonard's mother, Beverly, much to his concern. Oct 16, 2017 21m
  5. 5 The Collaboration Contamination Sheldon and Raj confide in Bernadette when they can't handle Amy and Howard working together on a science project. Also, Penny and Leonard learn new tactics for how to deal with S… Oct 23, 2017 19m
  6. 6 The Proton Regeneration Sheldon 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 Bernadette and Howard both wind up on bed res… Nov 2, 2017 21m
  7. 7 The Geology Methodology Sheldon and Bert collaborate on a research project, despite Sheldon’s embarrassment. Also, Penny and Bernadette coach Raj on how to navigate his relationship with Ruchi. Nov 9, 2017 20m
  8. 8 The Tesla Recoil Leonard and Howard are furious after they learn Sheldon went to work with the military behind their backs. Also, while Bernadette is on bed rest, she asks Raj to do some digging w… Nov 16, 2017 19m
  9. 9 The Bitcoin Entanglement Sheldon tries to teach the guys a lesson after they cut him out of a potentially valuable Bitcoin investment. Also, a seven-year-old video reveals a secret about Leonard and Penny… Nov 30, 2017 19m
  10. 10 The Confidence Erosion Sheldon and Amy try to eliminate stress from wedding planning by applying math to the process. Also, Raj “breaks up” with Howard after realizing his best friend is actually hurtin… Dec 7, 2017 21m
  11. 11 The Celebration Reverberation Raj 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. Also, Leonard gets a … Dec 14, 2017 20m
  12. 12 The Matrimonial Metric Sheldon and Amy try to pick their Best-Man and Maid of Honor by experimenting on the gang. Jan 4, 2018 20m
  13. 13 The Solo Oscillation When Sheldon kicks Amy out to work solo, she and Leonard bond during a series of science experiments. Also, Bert the geologist replaces Wolowitz in the band Footprints on the Moon… Jan 11, 2018 21m
  14. 14 The Separation Triangulation Raj finds himself in the middle of domestic drama when he learns the woman he's dating, has a very upset husband. Also, when Sheldon rents his old room back for a quiet place to w… Jan 18, 2018 19m
  15. 15 The Novelization Correlation Leonard's book raises questions, and Amy guest stars on the new Professor Proton show. Feb 1, 2018 21m
  16. 16 The Neonatal Nomenclature When Bernadette won't go into labor, the gang tries different tactics to get things started. Also, Howard confronts Bernadette after Amy accidentally reveals she's already chosen … Mar 1, 2018 19m
  17. 17 The Athenaeum Allocation Leonard jumps through hoops to help secure the perfect wedding venue for Sheldon and Amy. Also, Bernadette and Howard have a hard time deciding who should stay at home with the ki… Mar 8, 2018 20m
  18. 18 The Gates Excitation Bill Gates visits Penny's work, and the gang schemes to meet him. Hilarity ensues. Meanwhile, Sheldon is convinced that he's a target of an April's Fools prank. Mar 29, 2018 20m
  19. 19 The Tenant Disassociation When Leonard learns Sheldon is the president of the tenants association, he decides to run against him. Also, Bernadette encourages Howard and Raj to find the owner of a drone aft… Apr 5, 2018 21m
  20. 20 The Reclusive Potential A brilliant but reclusive scientist, Doctor Wolcott, invites Sheldon to his cabin in the middle of nowhere, and Leonard, Raj and Howard go along for the trip. Also, Penny and Bern… Apr 12, 2018 21m
  21. 21 The Comet Polarization Sheldon’s comic book store experience changes when writer Neil Gaiman puts Stuart’s store on the map. Also, friendships are threatened when Raj takes credit for Penny's astronomic… Apr 19, 2018 20m
  22. 22 The Monetary Insufficiency Sheldon 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. Apr 26, 2018 19m
  23. 23 The Sibling Realignment When 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 family feud. Also, the Wolowitz kids i… May 3, 2018 20m
  24. 24 The Bow Tie Asymmetry When 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. May 10, 2018 22m
Season 12 2018 · 24 eps
  1. 1 The Conjugal Configuration Sheldon and Amy's honeymoon runs aground in New York. Penny and Leonard discover they are uncomfortably similar to Amy's parents. Raj insults physicist Neil deGrasse Tyson and sta… Sep 24, 2018 20m
  2. 2 The Wedding Gift Wormhole Sheldon and Amy drive themselves crazy trying to figure out what 'perfect gift' Leonard and Penny gave them for their wedding. Raj decides he wants to settle down and asks his fat… Sep 27, 2018 21m
  3. 3 The Procreation Calculation The Wolowitzes' life gets complicated when Stuart starts bringing his new girlfriend home. Also, Penny and Leonard talk about starting a family, while Raj explores an arranged mar… Oct 4, 2018 20m
  4. 4 The Tam Turbulence When Sheldon won't tell anyone why he's never mentioned his childhood best friend, Leonard takes matters into his own hands. Bernadette and Penny take out Raj’s fiancée for dinner… Oct 11, 2018 19m
  5. 5 The Planetarium Collision When 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 means accidentally sabotaging her career… Oct 18, 2018 19m
  6. 6 The Imitation Perturbation When Howard dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny's Halloween party. Leonard is shocked that Penny doesn't remember their first kiss. Oct 25, 2018 20m
  7. 7 The Grant Allocation Derivation Leonard is caught between a rock and a hard place when he's responsible for distributing extra grant money. Bernadette turns the backyard playhouse into a hideaway from Howard and… Nov 1, 2018 20m
  8. 8 The Consummation Deviation Sheldon tries to bond with Amy's father, but when Howard lures Mr. Fowler away with magic tricks, Sheldon has no choice but to bond with Mrs. Fowler. Raj and Anu try to get physic… Nov 8, 2018 22m
  9. 9 The Citation Negation Sheldon and Amy are devastated after learning from a Russian paper that Super Asymmetry has already been theorized and disproven. Meanwhile, ultra-competitive Bernadette asks Stua… Nov 15, 2018 21m
  10. 10 The VCR Illumination Sheldon and Amy are still down about their theory being disproven, but a VHS tape from Sheldon’s past inspires him not to give up. Bernadette turns into a pageant mom when she tri… Dec 6, 2018 21m
  11. 11 The Paintball Scattering Penny and Leonard organize a paintball game that results in mayhem when Sheldon is jealous of Amy. Also, Raj catches Anu with her ex-boyfriend, and Stuart gets cold feet when Deni… Jan 3, 2019 20m
  12. 12 The Propagation Proposition Penny runs into her ex-boyfriend, Zack, who invites her and Leonard to a dinner to meet his newlywed wife. After the dinner the newlywed couple make an odd proposition to Leonard,… Jan 10, 2019 20m
  13. 13 The Confirmation Polarization Sheldon and Amy are thrilled when their super asymmetry theory is proven by two physicists, until they try to kick Amy off the Nobel nomination. Also, Bernadette gets one of her d… Jan 17, 2019 21m
  14. 14 The Meteorite Manifestation Sheldon is thrilled to help Bernadette and Wolowitz navigate bureaucratic paperwork, until he discovers they are breaking the law. Also, Leonard is disappointed when his friends e… Jan 31, 2019 20m
  15. 15 The Donation Oscillation Penny tries to seduce an abstaining Leonard to ruin his "donation" for her ex-boyfriend, Zack, and his wife, Marissa. Also, Wolowitz, Bernadette, Anu and Koothrappali turn Koothra… Feb 7, 2019 22m
  16. 16 The D & D Vortex The 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 … Feb 21, 2019 21m
  17. 17 The Conference Valuation When Penny and Bernadette go to San Diego for a pharmaceutical sales convention, Wolowitz is in charge of the kids. Also, Sheldon finds a book on experimenting on kids, and the gu… Mar 7, 2019 20m
  18. 18 The Laureate Accumulation When competitors Pemberton and Campbell charm America on a publicity tour, Sheldon and Amy try to bring Nobel laureates Kip Thorne, George Smoot and Frances Arnold to their side. … Apr 4, 2019 22m
  19. 19 The Inspiration Deprivation The concept of what it would mean for women everywhere if Amy were to win a Nobel Prize causes Amy to have a meltdown. Also, Howard and Raj try to relive the good old days after H… Apr 18, 2019 21m
  20. 20 The Decision Reverberation Raj is worried people won’t take him seriously in his own field after publishing a paper that suggests he may have discovered alien life. Also, Leonard wants to be the principal i… Apr 25, 2019 20m
  21. 21 The Plagiarism Schism Kripke 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. Meanwhile, Howard learns that Bernadette … May 2, 2019 20m
  22. 22 The Maternal Conclusion Leonard 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… May 9, 2019 21m
  23. 23 The Change Constant / The Stockholm Syndrome Sheldon and Amy await big news. Meanwhile, Penny and Leonard have some big news of their own. Also, Howard and Bernadette face the stressful challenge of leaving their kids for th… May 16, 2019 42m
  24. 24 Unraveling the Mystery: A Big Bang Farewell Johnny Galecki and Kaley Cuoco will lead fans on a trip down memory lane, sharing some of the best-kept backstage secrets and personal memories from the past 12 years. May 16, 2019 24m
Specials 3 eps
  1. 1 Unaired Pilot When Leonard and Sheldon encounter a young woman crying on the curb, Leonard invites her to dinner. She is abrasive, sexy, hard, and sarcastic, but she softens a little when she d… 22m
  2. 2 Access All Areas Celebrating the 100th episode of US sitcom The Big Bang Theory, Rick Edwards travels to the Hollywood set for an access-all-areas visit, catching up with the cast and learning eve… Apr 5, 2012 22m
  3. 3 It All Started With A Big Bang Celebrating the 100th episode of The Big Bang Theory, Rick Edwards looks back at some of the US sitcom's most hilarious and memorable scenes and talks with the cast and crew on th… Apr 5, 2012 22m
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