Physicists Leonard and Sheldon find their nerd-centric social circle with pals Howard and Raj expanding when aspiring actress Penny moves in next door.
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see all options Availability data: JustWatch
- Seasons
- 12
- Episodes aired
- 279
- Latest aired
- S12E23
- Total runtime
- 3d 22h
Timeline when each season aired
- Season 1 September 2007 – May 2008 17 episodes
- Season 2 September 2008 – May 2009 23 episodes
- Season 3 September 2009 – May 2010 23 episodes
- Season 4 September 2010 – May 2011 24 episodes
- Season 5 September 2011 – May 2012 24 episodes
- Season 6 September 2012 – May 2013 24 episodes
- Season 7 September 2013 – May 2014 24 episodes
- Season 8 September 2014 – May 2015 24 episodes
- Season 9 September 2015 – May 2016 24 episodes
- Season 10 September 2016 – May 2017 24 episodes
- Season 11 September 2017 – May 2018 24 episodes
- Season 12 September 2018 – May 2019 24 episodes
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S12E01 The Conjugal Configuration
September 24 · 20min find the promo
Show synopsis
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 starts a Twitter war.
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S12E02 The Wedding Gift Wormhole
September 27 · 21min find the promo
Show synopsis
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 father to arrange a marriage for him.
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S12E03 The Procreation Calculation
October 4 · 20min find the promo
Show synopsis
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 marriage.
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S12E04 The Tam Turbulence
October 11 · 19min find the promo
Show synopsis
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 to get the skinny on her.
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S12E05 The Planetarium Collision
October 18 · 19min find the promo
Show synopsis
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 in the process. Raj doesn’t want Howard to join him in hosting a show at the planetarium.
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S12E06 The Imitation Perturbation
October 25 · 20min find the promo
Show synopsis
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.
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S12E07 The Grant Allocation Derivation
November 1 · 20min find the promo
Show synopsis
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 the kids.
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S12E08 The Consummation Deviation
November 8 · 22min find the promo
Show synopsis
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 physical for the first time.
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S12E09 The Citation Negation
November 15 · 21min find the promo
Show synopsis
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 Stuart’s girlfriend to teach her how to beat Howard in a popular video game.
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S12E10 The VCR Illumination
December 6 · 21min find the promo
Show synopsis
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 tries to help Howard ace his Magic Castle audition.
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S12E11 The Paintball Scattering
January 3 · 20min find the promo
Show synopsis
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 Denise hints at the possibility of them living together.
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S12E12 The Propagation Proposition
January 10 · 20min find the promo
Show synopsis
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, which makes Penny to freak out. Also, Raj attempts to mend things with his ex-fiancée, Anu.
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S12E13 The Confirmation Polarization
January 17 · 21min find the promo
Show synopsis
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 drugs approved at work and wants a reluctant Penny to head the sales team.
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S12E14 The Meteorite Manifestation
January 31 · 20min find the promo
Show synopsis
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 exclude him from a scientific project.
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S12E15 The Donation Oscillation
February 7 · 22min find the promo
Show synopsis
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 Koothrappali's canceled bachelor party into a couple's trip.
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S12E16 The D & D Vortex
February 21 · 21min find the promo
Show synopsis
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 are the path to make it to the one open seat.
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S12E17 The Conference Valuation
March 7 · 20min find the promo
Show synopsis
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 guys plus Amy make a day of it.
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S12E18 The Laureate Accumulation
April 4 · 22min find the promo
Show synopsis
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. Also, Halley's fear of the dark causes opportunity and conflict at the Wolowitz home.
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S12E19 The Inspiration Deprivation
April 18 · 21min find the promo
Show synopsis
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 Howard buys a scooter that looks like the one he had years ago.
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S12E20 The Decision Reverberation
April 25 · 20min find the promo
Show synopsis
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 investigator on a plasma physics study.
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S12E21 The Plagiarism Schism
May 2 · 20min find the promo
Show synopsis
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 wasn't the only waitress at the Cheesecake Factory who had a crush on him.
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S12E22 The Maternal Conclusion
May 9 · 21min find the promo
Show synopsis
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 welcome at the Wolowitz house.
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S12E23 The Change Constant / The Stockholm Syndrome
May 16 · 42min find the promo
Show synopsis
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 the first time and Raj makes a new friend, as the gang travels together into an uncharted future.
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S12E24 Unraveling the Mystery: A Big Bang Farewell
May 16 · 24min find the promo
Show synopsis
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.